Relph is an English surname. It is a variant of the surname Relf, which stems from the old French given name Riulf. The name was derived from Germanic words ric (power) and wulf (wolf).[1] Notable people with the surname include:
- Edward Relph, Canadian geographer
- Emma Relph, British actress
- George Relph (1888–1960), English actor
- Little Tich (born Harry Relph; 1867–1928), English music hall comedian
- Jerry Relph (1944-2020), American politician
- Joseph Relph (1712–1743), English poet
- Michael Relph (1915–2004), English film producer and director
- Nick Relph (born 1979), British artist-filmmaker
- Pam Relph (born 1989), British Paralympic rower
- Simon Relph (1940–2016), British film producer and director
- Tyler Relph (born 1984), American basketball trainer and former player
- William Relph (1900–1978), English football forward