Marquess of Hertford

Marquessate in the Peerage of Great Britain

Marquessate of Hertford

Arms: Sable, on a bend cotised Argent a Rose Gules, between two Annulets of the first (for Conway); quartering Quarterly, 1st and 4th: Or, on a Pile Gules between six Fleurs-de-lys Azure three Lions of England (special grant); 2nd and 3rd: Gules, two Wings conjoined in lure Or (Seymour, arms of Edward Seymour, 1st Duke of Somerset (d.1552)). Crests: 1st: the Bust of a Moor in profile couped at the shoulders proper, and wreathed about the temples Argent and Azure (Conway). 2nd: out of a Ducal Coronet Or, a Phoenix Or, issuing from of flames proper (Seymour). Supporters: On either side a Blackamoor wreathed about the temples Or and Sable, habited in short golden garments and in buskins gold, adorned about their waists with red and green feathers, each holding in his exterior hand a Shield Azure, garnished Or, the dexter charged with a Sun-in-Splendour gold, and the sinister with a Crescent Argent.[1]

Creation date| 5 July 1793
Creation| Second
Created by| George III
Peerage| Peerage of Great Britain
First holder| Francis Seymour-Conway, 1st Marquess of Hertford
Present holder| Henry Seymour, 9th Marquess of Hertford
Heir apparent| William Seymour, Earl of Yarmouth
Remainder to| The 1st Marquess's heirs male of the body lawfully begotten
Subsidiary titles| Earl of Hertford
Earl of Yarmouth
Viscount Beauchamp
Baron Conway
Baron Conway and Killultagh
Status| Extant
Seat(s)| Ragley Hall
Motto| FIDE ET AMORE
(By faith and love)
For the 1st Creation see the Dukedom of Somerset

The titles of Earl of Hertford and Marquess of Hertford have been created several times in the peerages of England and Great Britain.

The third Earldom of Hertford was created in 1559 for Edward Seymour, who was simultaneously created Baron Beauchamp of Hache. His grandson William Seymour was subsequently created Marquess of Hertford and restored to the title of Duke of Somerset; the Marquessate became extinct in 1675 and the other three titles in 1750.

The present Marquessate was created in 1793. Lord Hertford holds the subsidiary titles of Earl of Yarmouth (Peerage of Great Britain, 1793), Earl of Hertford (Peerage of Great Britain, 1750), Viscount Beauchamp (Peerage of Great Britain, 1750), Baron Conway, of Ragley in the County of Warwick (Peerage of England, 1703), and Baron Conway of Killultagh, of Killultagh in the County of Antrim (Peerage of Ireland, 1712). Lord Hertford's heir uses the style Earl of Yarmouth.

The Marquesses of Hertford are members of the Seymour family headed by the Duke of Somerset. Francis Seymour (1679–1732) was the fourth son of Sir Edward Seymour of Berry Pomeroy, 4th Baronet, a descendant of Edward Seymour, 1st Duke of Somerset (Sir Edward's grandson Sir Edward Seymour, 6th Baronet, of Berry Pomeroy succeeded as 8th Duke of Somerset in 1750). Upon the death of his elder brother, Francis succeeded to the estates of his relative Edward Conway, 1st Earl of Conway. In 1703 he was created Baron Conway in the Peerage of England and assumed the additional surname of Conway. In 1712 he was created Baron Conway of Killultagh in the Peerage of Ireland. In 1750 his son Francis Seymour-Conway, 2nd Baron Conway, was created Viscount Beauchamp and Earl of Hertford.[2] These were revivals of titles previously held by the Dukes of Somerset, which had become extinct the same year on the death of Seymour-Conway's kinsman Algernon Seymour, 7th Duke of Somerset. In 1793 he was further honoured when he was made Earl of Yarmouth and Marquess of Hertford.[3] The latter title had also previously been held by the Dukes of Somerset, but had become extinct in 1675 (see below).

The family seat is Ragley Hall, near Alcester, Warwickshire.

## Earls of Hertford, First creation (1138)[edit]

* Richard Fitz Gilbert de Clare (d. 1136), traditionally but erroneously called Earl of Hertford
* Gilbert de Clare, 1st Earl of Hertford (d. 1153) Son of the above.
* Roger de Clare, 2nd Earl of Hertford (d. 1173) Brother of the above.
* Richard de Clare, 3rd Earl of Hertford (d. 1217) Son of the above.
* Gilbert de Clare, 4th Earl of Hertford (d. 1230) became 5th Earl of Gloucester in 1218
* For further Earls, mergred with the Earl of Gloucester.

## Earls of Hertford, Second creation (1537)[edit]

* Edward Seymour, 1st Duke of Somerset, 1st Earl of Hertford (1500–1552), forfeit 1552

## Earls of Hertford, Third creation (1559)[edit]

* Edward Seymour, 1st Earl of Hertford (1539–1621)
* William Seymour, 2nd Earl of Hertford (1587–1660) (became Marquess of Hertford in 1641)

## Marquesses of Hertford, First creation (1641)[edit]

* William Seymour, 2nd Duke of Somerset, 1st Marquess of Hertford, 2nd Earl of Hertford (1587–1660) (restored to the Dukedom of Somerset in 1660)
* William Seymour, 3rd Duke of Somerset, 2nd Marquess of Hertford, 3rd Earl of Hertford (1651–1671)
* John Seymour, 4th Duke of Somerset, 3rd Marquess of Hertford, 4th Earl of Hertford (died 1675) (Marquessate extinct 1675)

## Earls of Hertford, Third creation (1559; Reverted)[edit]

* Francis Seymour, 5th Duke of Somerset, 5th Earl of Hertford (1658–1678)
* Charles Seymour, 6th Duke of Somerset, 6th Earl of Hertford (1662–1748)
* Algernon Seymour, 7th Duke of Somerset, 7th Earl of Hertford (1684–1750) (Earldom extinct on his death in 1750)

## Barons Conway, Second creation (1703)[edit]

* Francis Seymour-Conway, 1st Baron Conway (1679–1732)
* Francis Seymour-Conway, 2nd Baron Conway, (1718–1794) (created Earl of Hertford in 1750 and Marquess of Hertford in 1793)

## Earls of Hertford, Fourth creation (1750)[edit]

* Francis Seymour-Conway, 1st Earl of Hertford, 1st Viscount Beauchamp, 2nd Baron Conway (1718–1794) (created Marquess of Hertford and Earl of Yarmouth in 1793)

## Marquesses of Hertford, Second creation (1793)[edit]

* Francis Seymour-Conway, 1st Marquess of Hertford (1718–1794)
* Francis Ingram-Seymour-Conway, 2nd Marquess of Hertford (1743–1822)
* Francis Charles Seymour-Conway, 3rd Marquess of Hertford (1777–1842)
* Richard Seymour-Conway, 4th Marquess of Hertford (1800–1870)
* Francis Hugh George Seymour, 5th Marquess of Hertford (1812–1884)
* Hugh de Grey Seymour, 6th Marquess of Hertford (1843–1912)
* George Francis Alexander Seymour, 7th Marquess of Hertford (1871–1940)
* Hugh Edward Conway Seymour, 8th Marquess of Hertford (1930–1997)
* Henry Jocelyn Seymour, 9th Marquess of Hertford (b. 1958)

The heir apparent is the present holder's eldest son, William Francis Seymour, Earl of Yarmouth (b. 1993)
The heir apparent's heir apparent is his eldest son, Clement Andrew Seymour, Viscount Beauchamp (b. 2019)

## Family tree[edit]

* v
* t
* e

Family tree of the
Dukes of: Beaufort, Dorset, Lancaster, and Somerset,
Marquesses of: Dorset, Hertford, Somerset and Worcester, and
Earls of: Dorset, Hertford, Lancaster, Leicester, Middlesex, Somerset, and Worcester

| | | | | | | | | | | | | Earl of Dorset (possible 1st creation), 1070

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| | | | | | | | | | | | Saint Osmund
(d. 1099)
Bishop of Salisbury and possible Earl of Dorset| | | | | | Roger de Beaumont
(c. 1015–1094)
| | | | | | | | | | | | Earl of Dorset (1st creation) discontinued, 1099| | | | | | | | | | | | | |
| | | |
| | | | | | | | | | | | | | | | | | | | Earl of Leicester (1st creation), 1107| | | | |
| | | | | | | | King Henry I
(c. 1068–1135)| | King Stephen
(1092/1096–1154)| | | | | | Robert de Beaumont
(c. 1040/1050–1118)
1st Earl of Leicester| | Henry de Beaumont
(d. 1119)
1st Earl of Warwick
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | Earl of Worcester (1st creation), 1138| | | | | | | | | | | | | |
| | | | | | | | Robert FitzRoy
(c. 1090–1147)
1st Earl of Gloucester| | Matilda
(d. bef. 1141)| | Waleran de Beaumont
(1104–1166)
Earl of Worcester| | Robert de Beaumont
(1104–1168)
2nd Earl of Leicester| | Hugh de Beaumont
(b. 1106)
1st Earl of Bedford|
| | | | | | | | | | | | | | | | | Earldom of Worcester (1st creation) extinct, 1166| | | | |
| | | | | | | | | | | | | | | | | | | | | | | | |
| | | | |
| | | | | | | | William FitzRobert
(1116–1183)
2nd Earl of Gloucester| | | | | | Hawise de Beaumont| | Robert de Beaumont
(d. 1190)
3rd Earl of Leicester
| | | | |
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| | | | | | | | | | | | | | | | | | | | | Robert de Beaumont
(d. 1204)
4th Earl of Leicester| | Amice
Countess of Rochefort
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | King John
(1166–1216)| | Isabella
(1173/1174–1217)
Countess of Gloucester| | | | | | | | | | Simon de Montfort
(c. 1175–1218)
5th Earl of Leicester

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | |
| | | | | | | | King Henry III
(1207–1272)| | | | | | | | | | Eleanor of England| | Simon de Montfort
(c. 1208–1265)
6th Earl of Leicester
| | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Leicester (1st creation) forfeited, 1265
| | | | | | | |
| | | | | | | | | | | | | | | | | Earl of Leicester (2nd creation), 1267
Earl of Lancaster, 1276
| | | | | | | | King Edward I
(1239–1307)| | | | | | Edmund Crouchback
(1245–1296)
1st Earl of Leicester, 1st Earl of Lancaster
| | | | | | | | | | | | | | | | | | | | | | | | |
| | | |
| | | | | | | | | | | | | | | | | | | | | | Earldom of Leicester (1st creation) restored, 1324
Earldom of Lancaster restored, 1327
| | | | | | | | King Edward II
(1284–1327)| | | | | | Thomas of Lancaster
(1278–1322)
2nd Earl of Leicester, 2nd Earl of Lancaster| | Henry of Lancaster
(1281–1345)
3rd Earl of Leicester, 3rd Earl of Lancaster
| | | | | | | | | | | | | | | | | Earldom of Leicester (1st creation) forfeited, 1322
Earldom of Lancaster forfeited, 1322| | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | Duke of Lancaster, 1351| | | | | | | | | | | | | | | | | | |
| | | | | | | | King Edward III
(1312–1377)| | | | | | | | | | Henry of Grosmont
(c. 1310–1361)
4th Earl of Leicester, Duke of Lancaster| | Joan of Lancaster
(c. 1312–1349)| | John (II) de Mowbray
(1310–1361)
3rd Baron Mowbray| | Eleanor of Lancaster
(1318–1372)| | Mary of Lancaster
(c. 1320–1362)

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earl of Worcester (2nd creation), 1397
| | | | | | | | |
| | | | | | | | John of Gaunt
(1340–1399)
(6th) Earl of Leicester (jure uxoris), Duke of Lancaster| | Blanche of Lancaster
(1342–1368)| | | | | | Maud of Lancaster
(1340–1362)
a.k.a. Matilda, Countess of Hainault| | William
(1330–1389)
Duke of Bavaria
Count of Holland
(5th) Earl of Leicester (jure uxoris)| | | | | | | Richard Fitzalan
(1346–1397)
Earl of Arundel| | Thomas Percy
(1343–1403)
Earl of Worcester|
| |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Worcester (2nd creation) extinct, 1403
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Roger La Warr
(1326–1370)| | Eleanor Mowbray| | | | |

| | | | | | | | | | | | | | Earl of Somerset (1st creation), 1397
Marquess of Somerset and Marquess of Dorset (1st creation), 1397| | Earl of Dorset (2nd creation), 1411| | | | | | | | | | | | | | | | | | | |
| | | | | | |
| | | | | | | | Henry Bolingbroke
(1367–1413)
(7th) Earl of Leicester, Duke of Lancaster
King Henry IV| | John Beaufort
(c. 1373–1410)
Marquess of Somerset, Marquess of Dorset, 1st Earl of Somerset| | Thomas Beaufort
(c. 1377–1426)
Duke of Exeter, Earl of Dorset| | Joan Beaufort
(c. 1379–1440)| | Joan La Warr| | Thomas West
(1365–1405)
1st Baron West| | Joan de Beauchamp
(1375–1435)

| | | | | | | | Earldom of Leicester (2nd creation) and Dukedom of Lancaster merged into the Crown, 1399| | Marquessate of Somerset and Marquessate of Dorset (1st creation) revoked, 1399| | Earldom of Dorset (2nd creation) extinct, 1426| | | | | | | | | | | | | | | | | | | |
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| | | | | | | | Duke of Lancaster, 1399| | | | | | | | | | | | | | | | | | | | | | | | | Earl of Worcester (3rd creation), 1421
| | | | | | | | Henry of Monmouth
(1386–1422)
Duke of Lancaster
King Henry V| | | | | | | | | | | | | | | | Reginald West
(1395–1450)
6th Baron De La Warr and 3rd Baron West| | | | | | Richard Beauchamp
(1394–c. 1422)
Earl of Worcester
| | | | | | | | Dukedom of Lancaster merged into the Crown, 1413| | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Worcester (2nd creation) extinct, 1422
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| | | | | Duke of Somerset (1st creation), 1443| | | | | | Earl of Dorset (3rd creation), 1442
Marquess of Dorset (2nd creation), 1443
Duke of Somerset (2nd creation), 1448| | | | | | | | | | | | | | | | | | | | | | | |
Henry Beaufort
(1401–1418)
2nd Earl of Somerset| | John Beaufort
(1404–1444)
3rd Earl of Somerset, 1st Duke of Somerset| | | | | | Edmund Beaufort
(1406–1455)
2nd Duke of Somerset, 1st Marquess of Dorset, 4th Earl of Somerset, Earl of Dorset| | | | | | Richard Neville
(1400–1460)
Earl of Salisbury| | Richard West
(1430–1476)
7th Baron De La Warr and 4th Baron West| | Edward Neville
(d. 1476)
de facto 3rd (de jure 1st) Baron Bergavenny| | Elizabeth Beauchamp
(1415–1448)
| | | | Dukedom of Somerset (1st creation) extinct, 1444| | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | |
| | | | | | | | | | | | | | | | | | Claimed titles here are disputed| | | | | | | Earl of Worcester (4th creation), 1449| | | | |
| | | | Margaret Beaufort
(1443–1509)| | Elizabeth Woodville
(c. 1437–1492)| | Henry Beaufort
(1436–1464)
5th Earl of Dorset, 2nd Marquess of Dorset, 3rd Duke of Somerset| | Edmund Beaufort
(c. 1438–1471)
6th Earl of Dorset, 3rd Marquess of Dorset, 4th Duke of Somerset| | Cecily Neville
(c. 1425–1450)| | John Tiptoft
(1427–1470)
1st Earl of Worcester| | | | |
| | | | | | | | | | | | | | Earldom of Dorset, Marquessate of Dorset (2nd creation), and Dukedom of Somerset (2nd creation) attained, 1461, but possibly restored (disputed), 1463| | Earldom of Dorset, Marquessate of Dorset (2nd creation), and Dukedom of Somerset (2nd creation) extinct, 1471| | | | | | Earldom of Worcester (4th creation) attainted, 1470| | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Thomas West
(c. 1457–1525)
8th Baron De La Warr and 5th Baron West
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| | | | | | | | | | | | | | Marquess of Dorset (3rd creation), 1475| | Earl of Worcester (5th creation), 1514| | | | | | Earl of Worcester (4th creation) restored, 1471| | | | |
Margery Wentworth
(c. 1478–1550)| | King Henry VII
(1457–1509)| | Elizabeth of York
(1466–1503)| | Thomas Grey
(1451–1501)
1st Marquess of Dorset| | Charles Somerset
(c. 1460–1526)
1st Earl of Worcester| | Elizabeth Somerset
(c. 1476–1507)
suo jure 3rd Baroness Herbert| | Edward Tiptoft
(c. 1469–1485)
2nd Earl of Worcester| | Eleanor West
(b. 1481)| | Edward Guildford
(c. 1474–1534)
| | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Worcester (4th creation) extinct, 1485| | | | | | |
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Viscount Beauchamp "of Hache" (1st creation), 1536
Earl of Hertford (2nd creation), 1537
Duke of Somerset (4th creation), 1547| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Duke of Somerset (3rd creation), 1499
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Edward Seymour
(c. 1500–1552)
1st Duke of Somerset, 1st Earl of Hertford, 1st Viscount Beauchamp| | Jane Seymour
(c. 1508–1537)| | King Henry VIII
(1491–1547)| | Thomas Grey
(1477–1530)
2nd Marquess of Dorset| | Henry Somerset
(c. 1495–1548)
2nd Earl of Worcester, 4th Baron Herbert| | John Dudley
(1504–1553)
Duke of Northumberland| | Jane Guildford
(c. 1508/1509–1555)| | Mary Tudor
(1496–1533)
Queen of France
Duchess of Suffolk| | Prince Edmund
(1499–1500)
1st Duke of Somerset
| | |
Dukedom of Somerset (4th creation), Earldom of Hertford (2nd creation), and Viscountcy Beauchamp (1st creation) forfeit, 1552| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Dukedom of Somerset (3rd creation) extinct, 1500
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | Duke of Richmond and Somerset, 1525| | | | | | | | | | | | | | | | | | | | | | | |
| | | | | King Edward VI
(1537–1553)| | Henry Fitzroy
(1519–1536)
1st Duke of Richmond and Somerset| | | | | | | | | | | | | | | | Henry Grey
(1517–1554)
Duke of Suffolk
3rd Marquess of Dorset| | Lady Frances Brandon
(1517–1559)
Duchess of Suffolk

| | | | | | | | | | Dukedom of Richmond and Somerset extinct, 1536| | | | | | | | | | | | | | | | Marquessate of Dorset (3rd creation) attainted and honours forfeit, 1554| | |
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| | | | | Earl of Hertford (3rd creation) reverted, 1559| | | | | | | | | | | | | | | | | | | | | Earl of Leicester (3rd creation), 1564| | | | | | | | | | | | | | | | | Baron Buckhurst of Buckhurst in the County of Sussex (1st creation), 1567
Earl of Dorset (4th creation), 1604
Edward Seymour
(c. 1528–1593)| | Edward Seymour
(1539–1621)
1st Earl of Hertford| | | | | | Katherine Grey
(1540–1568)| | William Somerset
(c. 1526–1589)
3rd Earl of Worcester, 5th Baron Herbert| | John Dudley
(c. 1527–1554)
Earl of Warwick| | Robert Dudley
(1532–1588)
1st Earl of Leicester| | Mary Dudley
(d. 1586)
m. Henry Sidney| | Lord Guildford Dudley
(c. 1535–1554)| | Lady Jane Grey
(1537–1554)
Disputed Queen of England| | Thomas Sackville
(1536–1608)
1st Earl of Dorset, 1st Baron Buckhurst
| | | | | |
| | | | | Earldom of Hertford (3rd creation) forfeit, 1552| | | | | | | | | | | | | | | | | | | | Earldom of Leicester (3rd creation) extinct, 1588| | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earl of Leicester (4th creation), 1618| | | | | | | | |
Edward Seymour
(c. 1563–1613)
1st Baronet| | | | | | Edward Seymour
(1561–1612)
Viscount Beauchamp| | | | | | Edward Somerset
(1553–1628)
4th Earl of Worcester, 6th Baron Herbert| | | | | | Philip Sidney
(1554–1586)| | Mary Sidney
(1561–1621)| | Robert Sidney
(1563–1626)
1st Earl of Leicester| | | | | | Robert Sackville
(1561–1609)
2nd Earl of Dorset, 2nd Baron Buckhurst
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| | | | | Marquess of Hertford (1st creation), 1641
Duke of Somerset (4th creation restored), 1660| | Baron Seymour of Trowbridge, 1641| | Viscount Rochester, 1611
Earl of Somerset (3rd creation), 1613| | Marquess of Worcester, 1642| | Viscount Somerset of Cashel, 1626| | | | | | | | | | | | | | | | | | | | | | |
Edward Seymour
(c. 1580–1659)
2nd Baronet| | William Seymour
(1588–1660)
2nd Earl of Hertford, 1st Marquess of Hertford, 3rd Duke of Somerset| | Francis Seymour
(c. 1590–1664)
1st Lord Seymour of Trowbridge| | Robert Carr
(c. 1587–1645)
Earl of Somerset| | Henry Somerset
(1577–1646)
1st Marquess of Worcester, 5th Earl of Worcester, 7th Baron Herbert| | Thomas Somerset
(1579–1651)
Viscount Somerset| | | | | | | | | | Robert Sidney
(1595–1677)
2nd Earl of Leicester| | Richard Sackville
(1589–1624)
3rd Earl of Dorset, 3rd Baron Buckhurst| | Edward Sackville
(1591–1652)
4th Earl of Dorset, 4th Baron Buckhurst
| | | | | | | | | | | | | | | | Earldom of Somerset (3rd creation) and Viscountcy Rochester extinct, 1645| | | | | | | Viscountcy Somerset extinct, 1651| | | | | | | | | | | | | | | | | | | | | | | |
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Edward Seymour
(1610–1688)
3rd Baronet| | Henry Seymour
(c. 1626–1654)
Lord Beauchamp| | | Charles Seymour
(c. 1621–1665)
2nd Lord Seymour of Trowbridge| | | | | | Edward Somerset
(1601–1667)
2nd Marquess of Worcester, 6th Earl of Worcester, 8th Baron Herbert| | | | | | Philip Sidney
(1619–1698)
3rd Earl of Leicester| | Algernon Sidney
(1623–1683)| | Lady Lucy Sidney
(1630–1685)| | Henry Sidney
(1641–1704)
Earl of Romney| | Richard Sackville
(1522–1677)
5th Earl of Dorset, 5th Baron Buckhurst
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | Duke of Beaufort, 1682| | | | | | | | | | | | | | | | | | | | | Baron Cranfield, of Cranfield in the County of Middlesex, 1674
Earl of Middlesex (2nd creation), 1675
| | | | | | | | | | | |
Edward Seymour
(1633–1708)
4th Baronet| | William Seymour
(1650–1671)
3rd Duke of Somerset, 2nd Marquess of Hertford, 3rd Earl of Hertford| | John Seymour
(c. 1646–1675)
4th Duke of Somerset, 3rd Marquess of Hertford, 4th Earl of Hertford| | Francis Seymour
(1658–1678)
5th Duke of Somerset, 3rd Lord Seymour of Trowbridge| | Charles Seymour
(1662–1748)
6th Duke of Somerset| | Henry Somerset
(1629–1700)
1st Duke of Beaufort, 3rd Marquess of Worcester, 7th Earl of Worcester, 9th Baron Herbert| | Robert Sidney
(1649–1702)
4th Earl of Leicester| | | | | | | | | | Thomas Pelham
(1653–1712)| | Charles Sackville
(1522–1677)
6th Earl of Dorset, 1st Earl of Middlesex, 6th Baron Buckhurst, 1st Baron Cranfield
| | | | | | | | | | Marquessate of Hertford (1st creation) extinct, 1675| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | |
| | | | | Baron Conway of Ragley in the County of Warwick, 1703
Baron Conway of Killultagh in the County of Antrim, 1712| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Duke of Dorset, 1720
Edward Seymour
(1663–1740)
5th Baronet| | Francis Seymour-Conway
(1679–1732)
1st Baron Conway| | | | | | Edward Coke
(d. 1707)| | Algernon Seymour
(1684–1750)
7th Duke of Somerset, Earl of Northumberland| | Charles Somerset
(1660–1698)
styled Marquess of Worcester| | Philip Sidney
(1676–1705)
5th Earl of Leicester| | John Sidney
(1680–1737)
6th Earl of Leicester| | Jocelyn Sidney
(1682–1743)
7th Earl of Leicester| | Elizabeth Pelham
(1681–1711)| | Lionel Sackville
(1688–1765)
1st Duke of Dorset, 7th Earl of Dorset, 2nd Earl of Middlesex, 7th Baron Buckhurst, 2nd Baron Cranfield
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Leicester (4th creation) extinct, 1743| | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | Baron Lovel, of Minster Lovel in the County of Oxford, 1728
Earl of Leicester (5th creation) and Viscount Coke of Holkham in the County of Norfolk, 1744| | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Edward Seymour
(1695–1757)
6th Baronet
8th Duke of Somerset| | | | | | | | | | | | | | | | | | | | Anne Coke| | Thomas Coke
(1697–1759)
Earl of Leicester, Viscount Coke| | Henry Somerset
(1684–1714)
2nd Duke of Beaufort, 4th Marquess of Worcester, 8th Earl of Worcester, 10th Baron Herbert| | | | | | Charles Townshend
(1700–1764)
3rd Viscount Townshend| | | | | | | | | | | | | | |
| | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | Earl of Hertford (4th creation) and Viscount Beauchamp (2nd creation), 1850
Marquess of Hertford (2nd creation), 1793| | | | | | | Earldom of Leicester (5th creation) extinct, 1759| | | | | | | | | | | | | | | | | | | | | | | | | | | Viscount Sackville and Baron Bolebrooke in the County of Sussex, 1782
| | | | | | | | | | | | | | | | | |
Edward Seymour
(1717–1792)
9th Duke of Somerset| | Webb Seymour
(1718–1793)
10th Duke of Somerset| | | | | | Francis Seymour
(1726–1799)| | Francis Seymour-Conway
(1718–1794)
1st Marquess of Hertford, 1st Earl of Hertford, 1st Viscount Beauchamp, 2nd Baron Conway| | Wenman (Roberts) Coke
(c. 1717–1776)| | | | | | Henry Somerset-Scudamore
(1707–1745)
3rd Duke of Beaufort, 5th Marquess of Worcester, 9th Earl of Worcester, 11th Baron Herbert| | Charles Noel Somerset
(1709–1756)
4th Duke of Beaufort, 6th Marquess of Worcester, 10th Earl of Worcester, 12th Baron Herbert| | George Townshend
(1724–1807)
1st Marquess Townshend| | Charles Sackville
(1711–1769)
2nd Duke of Dorset, 8th Earl of Dorset, 3rd Earl of Middlesex, 8th Baron Buckhurst, 3rd Baron Cranfield| | John Sackville
(1713–1765)| | George Germain
(1716–1785)
1st Viscount Sackville, 1st Baron Bolebrooke
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | Earl of Leicester (7th creation), 1837| | | | | | | | | | Baron Botetourt abeyance terminated, 1803| | Earl of Leicester (6th creation), 1784| | | | | | | | | | | | | |
| | | | | | | | | | | | | Francis Compton Seymour
(d. 1822)| | Francis Ingram-Seymour-Conway
(1743–1822)
2nd Marquess of Hertford, 2nd Earl of Hertford, 2nd Viscount Beauchamp, 3rd Baron Conway| | Thomas William Coke
(1754–1842)
1st Earl of Leicester, 1st Viscount Coke| | | | | | | | | | Henry Somerset
(1744–1803)
5th Duke of Beaufort, 7th Marquess of Worcester, 11th Earl of Worcester, 13th Baron Herbert, 5th Baron Botetourt| | George Townshend
(1753–1811)
2nd Marquess Townshend, 1st Earl of Leicester| | | | | | John Frederick Sackville
(1745–1799)
3rd Duke of Dorset, 9th Earl of Dorset, 4th Earl of Middlesex, 9th Baron Buckhurst, 4th Baron Cranfield| | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Baron Raglan, 1852| | | | | | | | | | | | | | | | | | |
| | | | Edward Adolphus St Maur
(1775–1855)
11th Duke of Somerset| | | | | | | | | | | Francis Charles Seymour-Conway
(1777–1842)
3rd Marquess of Hertford, 3rd Earl of Hertford, 3rd Viscount Beauchamp, 4th Baron Conway| | | | | | | | | | | Henry Charles Somerset
(1766–1835)
6th Duke of Beaufort, 8th Marquess of Worcester, 12th Earl of Worcester, 14th Baron Herbert, 6th Baron Botetourt| | FitzRoy James Henry Somerset
(1788–1855)
1st Baron Raglan| | George Townshend
(1778–1855)
3rd Marquess Townshend, 2nd Earl of Leicester| | | | | | George John Frederick Sackville
(1793–1815)
4th Duke of Dorset, 10th Earl of Dorset, 5th Earl of Middlesex, 10th Baron Buckhurst, 5th Baron Cranfield| | John Frederick Sackville
(1767–1843)
5th Duke of Dorset, 11th Earl of Dorset, 6th Earl of Middlesex, 2nd Viscount Sackville, 11th Baron Buckhurst, 6th Baron Cranfield, 2nd Baron Bolebrooke
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Leicester (6th creation) extinct, 1855| | | | | | | | | | Dukedom of Dorset, Earldoms of Dorset (4th creation) and Middlesex (2nd creation), Viscountcy of Sackville, Baronies of Buckhurst (1st creation), Cranfield, and Bolebrooke extinct, 1843
| | | | | | | | | | | | | Francis Edward Seymour
(1788–1866)| | Richard Seymour-Conway
(1800–1870)
4th Marquess of Hertford, 4th Earl of Hertford, 4th Viscount Beauchamp, 5th Baron Conway| | | | | | | | | | | Henry Somerset
(1792–1853)
7th Duke of Beaufort, 9th Marquess of Worcester, 13th Earl of Worcester, 15th Baron Herbert, 8th Baron Botetourt| | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | |
Earl St. Maur, 1863| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Edward Adolphus St Maur
(1804–1885)
12th Duke of Somerset| | Archibald Henry Algernon St Maur
(1810–1891)
13th Duke of Somerset| | Algernon Percy Banks St Maur
(1813–1894)
14th Duke of Somerset| | Francis Payne Seymour
(1815–1870)| | Francis George Hugh Seymour
(1812–1884)
5th Marquess of Hertford, 5th Earl of Hertford, 5th Viscount Beauchamp, 6th Baron Conway| | Thomas William Coke
(1822–1909)
2nd Earl of Leicester, 2nd Viscount Coke| | | | | | Henry Charles FitzRoy Somerset
(1824–1899)
8th Duke of Beaufort, 10th Marquess of Worcester, 14th Earl of Worcester, 16th Baron Herbert, 8th Baron Botetourt| | | | | | Richard Henry FitzRoy Somerset
(1817–1884)
2nd Baron Raglan
Earldom St. Maur extinct, 1885| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | |
Edward Adolphus Ferdinand St. Maur
(1835–1869)| | | | | | Algernon St Maur
(1846–1923)
15th Duke of Somerset| | Edward Hamilton Seymour
(1860–1931)
16th Duke of Somerset| | Hugh de Grey Seymour
(1843–1912)
6th Marquess of Hertford, 6th Earl of Hertford, 6th Viscount Beauchamp, 7th Baron Conway| | Thomas William Coke
(1848–1941)
3rd Earl of Leicester, 3rd Viscount Coke| | | | | | Henry Adelbert Wellington FitzRoy Somerset
(1847–1924)
9th Duke of Beaufort, 11th Marquess of Worcester, 15th Earl of Worcester, 17th Baron Herbert, 9th Baron Botetourt| | Henry Richard Charles Somerset
(1849–1932)| | George FitzRoy Henry Somerset
(1857–1921)
3rd Baron Raglan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | |
| | | | | | | | Evelyn Francis Edward Seymour
(1882–1954)
17th Duke of Somerset| | George Francis Alexander Seymour
(1871–1940)
7th Marquess of Hertford, 7th Earl of Hertford, 7th Viscount Beauchamp, 8th Baron Conway| | Henry Charles Seymour
(1878–1939)| | Thomas William Coke
(1880–1949)
4th Earl of Leicester, 4th Viscount Coke| | Arthur George Coke
(1882–1915)| | | | | | | Henry Charles Somers Augustus Somerset
(1874–1945)| | FitzRoy Richard Somerset
(1885–1964)
4th Baron Raglan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | Percy Hamilton Seymour
(1910–1984)
18th Duke of Somerset| | | | | | | | | | | Thomas William Edward Coke
(1908–1976)
5th Earl of Leicester, 5th Viscount Coke| | Anthony Louis Lovel Coke
(1909–1994)
6th Earl of Leicester, 6th Viscount Coke| | Henry Hugh Arthur FitzRoy Somerset
(1900–1984)
10th Duke of Beaufort, 12th Marquess of Worcester, 16th Earl of Worcester, 18th Baron Herbert, 10th Baron Botetourt| | Henry Robert Somers FitzRoy de Vere Somerset
(1898–1965)| | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Barony Botetourt abeyant, 1984| | | | | | | | | | | | | | |
| | | |
| | | | | | | | | | | | | | | | | Hugh Edward Conway Seymour
(1930–1997)
8th Marquess of Hertford, 8th Earl of Hertford, 8th Viscount Beauchamp, 9th Baron Conway| | | | | | Edward Douglas Coke
(1936–2015)
7th Earl of Leicester, 7th Viscount Coke| | | | | | David Robert Somerset
(1928–2017)
11th Duke of Beaufort, 13th Marquess of Worcester, 17th Earl of Worcester| | FitzRoy John Somerset
(1927–2010)
5th Baron Raglan| | Geoffrey Somerset
(b. 1932)
6th Baron Raglan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | John Michael Edward Seymour
(b. 1952)
19th Duke of Somerset| | | | | | Henry (Harry) Jocelyn Seymour
(b. 1958)
9th Marquess of Hertford, 9th Earl of Hertford, 9th Viscount Beauchamp, 10th Baron Conway| | | | | | Thomas Edward Coke
(b. 1965)
8th Earl of Leicester, 8th Viscount Coke| | | | | | Henry John FitzRoy Somerset
(b. 1952)
12th Duke of Beaufort, 14th Marquess of Worcester, 18th Earl of Worcester| | | | | | Arthur Geoffrey Somerset (1960–2012)|
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | Sebastian Edward Seymour
(b. 1982)
styled Lord Seymour| | | | | | William Francis Seymour
(b. 1993)
styled Earl of Yarmouth| | | | | | Edward Horatio Coke
(b. 2003)
styled Viscount Coke| | | | | | Henry Robert FitzRoy Somerset
(b. 1989)
styled Marquess of Worcester| | | | | | Inigo Arthur Fitzroy Somerset
(b. 2004)|
| | | | | | | | Heir apparent to the Dukedom of Somerset| | | | | | Heir apparent to the Marquessage of Hertford| | | | | | Heir apparent to the Earldom of Leicester| | | | | | Heir apparent to the Dukedom of Beaufort| | | | | | Heir apparent to the Raglan Barony

## See also[edit]

* Duke of Somerset
* Baron Alcester
* Seymour family
* Earl of Conway

## References[edit]

1. ^ Debrett's Peerage. 1968. p. 1036.
2. ^ "No. 8975". The London Gazette. 31 July 1750. p. 2.
3. ^ "No. 13541". The London Gazette. 29 June 1793. p. 543.

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## Further reading[edit]

* Hesilrige, Arthur G. M. (1921). Debrett's Peerage and Titles of courtesy. 160A, Fleet street, London, UK: Dean & Son. p. 471.`{{cite book}}`: CS1 maint: location (link)
* 'Earls and Marquesses of Hertford'[usurped] on Leigh Rayment's Peerage Page. Retrieved 15 December 2009.

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Extant marquessates in the peerages of Britain and Ireland

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