- DAFYDD FYNGLWYD (fl. c. 1500-1550), poet
- DAFYDD GAM (d. 1415), Welsh warrior
- DAFYDD GLAN TEIFI - see SAUNDERS, DAVID, II
- DAFYDD GLYN DYFRDWY (fl. c. 1575), bard
- DAFYDD GOCH BRYDYDD o FUALLT (fl. end of the 16th century), poet
- DAFYDD GORLECH (1410? - 1490?), writer of cywyddau brud (vaticinations)
- DAFYDD GOWPER - see DAFYDD COWPER
- DAFYDD IONAWR - see RICHARDS, DAVID
- DAFYDD LLWYD (d. 1619) HENBLAS,, poet and scholar
- DAFYDD LLWYD ap DAFYDD ab EINION ap HYWEL (d. before 1469), prominent figure in Cydewain and a generous patron of the 15th century bards
- DAFYDD LLWYD ap HUW (fl. beginning of the 17th century), poet
- DAFYDD LLWYD ap LLYWELYN ap GRUFFUDD (c. 1420 - c. 1500) Mathafarn, poet
- DAFYDD LLWYD ap SION - see DAFYDD LLWYD o'r HENBLAS
- DAFYDD LLWYD MATHAU, MATHE, or MATHEW (fl. 1601-1629), poet and strolling minstrel
- DAFYDD LLWYD MATHE - see DAFYDD LLWYD MATHAU
- DAFYDD LLWYD MATHEW - see DAFYDD LLWYD MATHAU
- DAFYDD LLWYD SYBYLLTIR (fl. c. 1610), poet
- DAFYDD LLYFNI (fl. end of 16th century), poet
- DAFYDD MEIFOD (fl. c. 1600), poet
- DAFYDD MORGANWG - see JONES, DAVID WATKIN
- DAFYDD MYNYDDBACH - see JAMES, DANIEL
- DAFYDD NANCONWY (fl. 17th century), writer of cywyddau
- DAFYDD NANMOR (fl. 15th century), poet
- DAFYDD OFFEIRIAD Syr (fl. 15th century), cleric, and writer of vaticinatory poetry
- DAFYDD PENNANT (fl. late 16th century), bard
- DAFYDD SIÔN PIRS - see JONES, DAVID
- DAFYDD SIÔN SIÂMS - see JONES, DAFYDD
- DAFYDD TREFOR Syr (d. 1528?), cleric and bard
- DAFYDD WILIAM PRYS - see DAFYDD WILIAM PYRS
- DAFYDD WILIAM PYRS (or PRYS) (fl. c. 1660), poet
- DAFYDD WILLIAM PRYS (fl. 1603-1622), poet - see DAFYDD EMLYN
- DAFYDD Y COED (fl. 1380), poets
- DAFYDD Y GARREG WEN - see OWEN, DAVID
- DAFYDD, EDWARD (c. 1600 - 1678?) Margam, bard
- DAFYDD, JOHN (fl. 1747), hymn-writers
- DAFYDD, MAURICE (fl. 1789), hymn-writer
- DAFYDD, MEURIG (fl. second half of the 16th century), professional bard, staunch Papist, and one of the most important literary characters in Glamorgan
- DAFYDD, MORGAN (fl. 1747), hymnist - see DAFYDD, JOHN
- DAFYDD, OWEN (1751 - 1814?), rustic poet and ballad-writer
- DAFYDD, PHILIP (1732 - 1814), Methodist exhorter of Newcastle Emlyn
- DAFYDD, RICHARD WILLIAM (fl. 1740-1752), Methodist exhorter
- DAFYDD, ROBERT (1747 - 1834), Calvinistic Methodist preacher; a weaver
- DAFYDD, THOMAS (fl. 1765-1792), elegist and hymnist
- DAFYDD, WILLIAM (fl. c. 1597), poet
- DAGGAR, GEORGE (1879 - 1950), trade unionist and Member of Parliament
- DAGGER - see REES, THOMAS WYNFORD
- DAI LLWYD (fl. 1485) Cwm Bychan, harpist and warrior
- DAI MAESMOR (fl. 16th century), a harpist
- DAI O'R ONLLWYN - see FRANCIS, DAVID
- Dai Tenor - see JONES, DAVID JOHN