List of monarchs of Powys

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The kingdom of Powys covered the eastern part of central Wales. Regions included Builth and Gwerthrynion. It is important to note it was occupied by the Irish for a few years by Banadl (usually given as 441–447 AD),^{[citation needed]} and was united with Gwynedd in 854 upon the death of Cyngen ap Cadell by his nephew Rhodri Mawr.

The sequence of, and relationships between several, of the earliest recorded rulers of Powys are known primarily from much later sources such as the Harleian Genealogies, which include several contradictory lines of Powysian kings and show every sign of scribal error and in some case deliberate alteration.^[1][2] Therefore the following list, especially for the semi-legendary House of Gwertherion, cannot be considered certain.

• Gwrtheyrn (High-King Vortigern), allegedly married to Sevira, daughter of Magnus Maximus
• Cadeyern Fendigaid (c. 430–447), reputed to be the eldest son of Gwrtheyrn
• Cadell Ddyrnllwg (c. 447–460), said in the Historia Brittonum to have been blessed by Saint Germanus and succeeded Benlli Gawr, not Cadeyern.
• Rhuddfedel Frych (c. 480)
• Cyngen Glodrydd (c. 500)
• Pasgen ap Cadeyrn (c. 530)
• Mawgan ap Pasgen (c. 540)
• Brochwel Ysgithrog (c. 550)
• Cynan Garwyn (?–610)
• Selyf ap Cynan (610–613)
• Manwgan ap Selyf (613)
• Eiludd Powys (613–?)
• Beli ap Eiludd (655–695?)
• Gwylog ap Beli (695?–725)
• Elisedd ap Gwylog (725–755?)
• Brochfael ap Elisedd (755?–773)
• Cadell ap Brochfael (773–808)
• Cyngen ap Cadell (808–854) - throne usurped by Rhodri Mawr of Gwynedd and exiled to Rome where the family endured

• Rhodri Mawr (854–878) of Gwynedd, allegedly inheriting through his mother Nest, according to some manuscripts. Other manuscripts (eg. Mostyn manuscript 117) have his mother as Essyllt ferch Cynan (thought to be the daughter of Cynan Dindaethwy of Gwynedd).
• Merfyn ap Rhodri (878–900) (house of Aberffraw)
• Llywelyn ap Merfyn (900–942) (house of Aberffraw)
• Hywel Dda (942–950) (house of Dinefwr usurped from the Aberffraw line of Manaw)
• Owain ap Hywel (950–986) (Mathrafal dynasty, cadet branch of the House of Dinefwr)
• Maredudd ap Owain (986–999)
• Llywelyn ap Seisyll (999–1023), husband of Angharad, daughter of Maredudd ab Owain
• Rhydderch ap Iestyn (1023–1033)
• Iago ap Idwal (1033–1039)
• Gruffydd ap Llywelyn, invader and prince of Gwynedd (1039–1063)

• Bleddyn ap Cynfyn (1063–1075)
• Iorwerth ap Bleddyn (1075–1103 (part))
• Cadwgan ap Bleddyn (1075–1111 (part))
• Owain ap Cadwgan (1111–1116 (part))
• Maredudd ap Bleddyn (1116–1132)
• Madog ap Maredudd (1132–1160)

From 1160 Powys was split into two parts. The southern part was later called Powys Wenwynwyn after Gwenwynwyn ab Owain "Cyfeiliog" ap Madog, while the northern part was called Powys Fadog after Madog ap Gruffydd "Maelor" ap Madog.

• List of rulers of Wales
• Powys Fadog
• Powys Wenwynwyn
• Mechain
• Edeirnion

• The History Files: Celtic Kingdoms of the British Isles – Pagenses / Paganes (Romano-Britons)
• The History Files: Celtic Kingdoms of the British Isles – Powys (Wales)
• Kings of Powys: British Monarchs