Dafydd is a Welsh masculine given name, related to David, and more rarely a surname. People so named include:

Given name

Medieval era

1. Ordered chronologically

2. Dafydd ab Owain Gwynedd (1203), Prince of Gwynedd

Dafydd ap Gruffudd (1238–1283), Prince of Wales

• Dafydd Goch, said to be the illegitimate son of Dafydd ap Gruffudd

• Dafydd ap Gwilym (c. 1315/1320–c. 1350/1370), Welsh poet

• Dafydd ap Llywelyn (1215–1246), Prince of Gwynedd and first Prince of Wales

• Dafydd Bach ap Madog Wladaidd (), Welsh poet

• Dafydd Benfras (), Welsh court poet

• Dafydd Ddu o Hiraddug (died 1371), Welsh poet, grammarian and cleric

• Dafydd Gam (1380–1415), Welsh soldier and nobleman who died at the Battle of Agincourt

• Dafydd ab Ieuan or David Holbache (died 1422/3), Welsh politician

• Dafydd Gorlech (c. 1410–c. 1490), Welsh poet

• Dafydd Llwyd ap Llywelyn ap Gruffudd (Dafydd Llwyd o Fathafarn) (), Welsh poet

• Dafydd Nanmor (), Welsh poet

• Dafydd ab Edmwnd (), Welsh poet

• Dafydd ap Gruffydd (poet) (), Welsh poet

Modern era

1. Ordered alphabetically

2. Dafydd Trystan Davies (born 1974), Welsh academic and politician

3. Dafydd Elis-Thomas (1946–2025), Welsh politician

4. Dai Henwood (born 1978), New Zealand stand-up comedian and television host

5. Dafydd Hewitt (born 1985), Welsh retired rugby union player

6. Dafydd Howells (born 1995), Wales rugby union player

7. Dafydd ab Hugh (born 1960), American science fiction author born David Friedman

8. Dafydd Ieuan (born 1969), Welsh musician and producer

9. Dafydd Ifans (born 1949), Welsh novelist and translator

10. David Richards (Dafydd Ionawr) (1751–1827), Welsh poet

11. Dafydd Iwan (born 1943), Welsh folk singer and politician

12. Dafydd James (born 1975), Wales retired rugby union player

13. Dafydd Jenkins (legal scholar) (1911–2012), Welsh barrister, activist, and legal scholar and historian

14. Dafydd Jenkins (rugby union) (born 2002), Welsh rugby union player

15. Dafydd Jones (disambiguation)

16. David Edward Lewis (1866–1941), Welsh businessman and philanthropist

17. Dafydd Llywelyn (composer) (1939–2013), Welsh composer, pianist, conductor and teacher

18. Dafydd Llywelyn (politician) (born 1976), Welsh politician and Dyfed-Powys Police and Crime Commissioner

19. Dafydd Elystan Morgan, Baron Elystan-Morgan (1932–2021), Welsh politician

20. Dafydd Rogers (born 1969), West End and Broadway theatre producer

21. Dafydd Rowlands (1931–2001), Welsh Congregational minister, lecturer, writer and poet

22. Dafydd Stephens (1942–2012), Welsh audiological physician and professor

23. Dafydd Wigley (born 1943), Welsh politician

24. Dafydd Williams (born 1954), Canadian physician and retired astronaut

Surname

• Catrin Dafydd, Welsh writer, winner of the Crown at the 2018 National Eisteddfod

• Einir Dafydd, Welsh singer who won the third series of the television talent show Wawffactor and the 2007 Cân i Gymru competition

• Fflur Dafydd (born 1978), Welsh novelist, singer-songwriter and musician

• Guto Dafydd (born ), Welsh writer

• Myrddin ap Dafydd (born 1956), Welsh editor and prifardd (Chief Bard)

See also

• Dewi (disambiguation)

• David (name)

• Dafydd ap Gwilym Society, known as Y Dafydd

• Daffyd Thomas, character in the Little Britain television and radio sketch show