- DAFIS, - see DAVIS, DAVID
- DAFIS, DAFI - see DAVIES, DAVID
- DAFYDD ab EDMWND (fl. 1450-1490), gentleman and bardic master
- DAFYDD ab IEUAN ab IORWERTH (d. 1503), bishop of St Asaph
- DAFYDD ab IFAN ab EINION (fl. 1440-1468), soldier and commander of Harlech Castle during the Wars of the Roses
- DAFYDD ab OWAIN - see OWAIN, Sir DAFYDD
- DAFYDD ab OWAIN GWYNEDD (d. 1203), king of Gwynedd
- DAFYDD ALAW (fl. 1550), poet
- DAFYDD ap BLEDDYN (d. 1346), bishop
- DAFYDD ap DAFYDD LLWYD (1549), poet and member of the landed family
- DAFYDD (DAVID) ap GRUFFYDD (d. 1283), prince of Gwynedd
- DAFYDD ap GRUFFYDD (fl. c. 1600) Drewyn,, poet
- DAFYDD ap GRUFFYDD Nantconwy - see WYNN
- DAFYDD AP GWILYM (c. 1315 - c. 1350), poet
- DAFYDD ap GWILYM (fl. 1340-1370), poet
- DAFYDD ap HARRI WYN (fl. 1568), poet
- DAFYDD ap HUW'R GOF (fl. 1610-1657), poet
- DAFYDD ap HWLCYN ap MADOG (fl. 17th century), poet
- DAFYDD ap HYWEL ap IEUAN FYCHAN (fl. ? 1480-1510), poet
- DAFYDD ap HYWEL GRYTHOR, a player on the crwth
- DAFYDD ap IEUAN (IFAN) ab OWEN (fl. 1560), poet
- DAFYDD ap IEUAN LLWYD (fl. 1500), poet
- DAFYDD ap IFAN ab OWEN - see DAFYDD ap IEUAN ab OWEN
- DAFYDD AP LLEWELYN AP HYWEL - see DAFYDD GAM
- DAFYDD ap LLYWELYN (d. 1246), prince
- DAFYDD ap LLYWELYN ap MADOG (fl. 16th century), poet
- DAFYDD ap MAREDUDD ab EDNYFED (fl. c. 1460), poet
- DAFYDD ap MAREDUDD ap TUDUR (fl. 1460) Tregynon, poets
- DAFYDD AP MAREDUDD GLAIS, murderer, civic official, scribe and translator
- DAFYDD ap MAREDUDD GLAIS (fl. 1429-1468), cleric, murderer, civic official, and translator of a chronicle of the kings of England into Welsh
- DAFYDD ap OWAIN - see OWAIN, Sir DAFYDD
- DAFYDD ap PHYLIP ap RHYS Syr (fl. c. 1500-1540), poet (probably in holy orders)
- DAFYDD ap RHYS ap LLYWELYN Bodewryd (d. 1551) - see WYNN
- DAFYDD ap RHYS O FENAI (or O'R FENNI) (fl. c. 1550), poet
- DAFYDD ap RHYS O'R FENNI - see DAFYDD ap RHYS O FENAI
- DAFYDD ap SIANCYN (SIENCYN) ap DAFYDD ap y CRACH (fl. mid 15th century), Lancastrian partisan and poet
- DAFYDD ap SIANCYN FYNGLWYD (fl. c.1500-1550), poet - see DAFYDD FYNGLWYD
- DAFYDD ap SIENCYN ap DAFYDD ap y CRACH - see DAFYDD ap SIANCYN ap DAFYDD ap y CRACH
- DAFYDD BACH AP MADOG WLADAIDD - see SYPYN CYFEILIOG II
- DAFYDD BACH ap MADOG WLADAIDD - see CNEPPYN GWERTHRYNION
- DAFYDD BAENTIWR (fl. c. 1500-1530?), a poet
- DAFYDD BENFRAS (fl. 1230-1260), poet
- DAFYDD BENWYN (fl. second half of the 16th century), bards of Glamorgan
- DAFYDD BRYDYDD HIR - see JONES, DAVID
- DAFYDD COWPER (GOWPER) (fl. c. 1500), poet
- DAFYDD DARON (fl. 1400), dean of Bangor
- DAFYDD DDU ATHRO HIRADDUG (fl. before 1400), a poet
- DAFYDD DDU ERYRI - see THOMAS, DAVID
- DAFYDD EMLYN (fl. 1603-1622), poet and cleric
- DAFYDD EPYNT (fl. c. 1460), poet