- DERFEL, ROBERT JONES (1824 - 1905), bardd a sosialydd
- teulu DEVEREUX Lamphey, Ystrad Ffin, Vaynor, Nantariba, Pencoyd,
- DEVONALD, JOHN (1863 - 1936), cerddor
- DEWI ab IAGO - gweler DAVIES, JAMES
- DEWI AFAN - gweler MICHAEL, DAVID
- DEWI ap DIDYMUS - gweler THOMAS, DAFYDD
- DEWI ap IAGO - gweler DAVIES, JAMES
- DEWI ARFON - gweler JONES, DAVID HUGH
- DEWI BREFI - gweler ROWLAND, DAVID
- DEWI DAWEL - gweler EVANS, DAVID
- DEWI DINORWIG - gweler PRICE, DAVID
- DEWI DYWYLL - gweler JONES, DAVID
- DEWI EINION - gweler DAVIES, DAVID LLOYD
- DEWI ELFED - gweler JONES, DAVID BEVAN
- DEWI EMLYN - gweler DAVIES, DAVID
- DEWI EMRYS - gweler JAMES, DAVID EMRYS
- DEWI FARDD - gweler JONES, DAVID
- DEWI GLAN PERYDDON - gweler DAVIES, DAVID LLOYD
- DEWI HARAN - gweler EVANS, DAVID
- DEWI HAVHESP - gweler ROBERTS, DAVID
- DEWI HEFIN - gweler THOMAS, DAVID
- DEWI HELI - gweler WILLIAMS
- DEWI HIRADDUG - gweler EVANS, DAVID DELTA
- DEWI MAI o FEIRION - gweler ROBERTS, DAVID JOHN
- DEWI MEDI - gweler JONES, DAVID
- DEWI MOELWYN - gweler PARRY, DAVID
- DEWI MÔN - gweler ROWLANDS, DAVID
- DEWI NANTBRÂN - gweler POWELL, DAVID
- DEWI o DDYFED - gweler JAMES, DAVID
- DEWI o GEREDIGION - gweler SAMUEL, DAVID
- DEWI OGWEN - gweler ROBERTS, DAVID
- DEWI SANT, sefydlydd ac abad-esgob cyntaf Tyddewi a nawddsant Cymru
- DEWI SILIN - gweler RICHARDS, THOMAS
- DEWI TEIFI - gweler MORGAN, DEWI
- DEWI WYLLT - gweler JONES, DAVID
- DEWI WYN o EIFION - gweler OWEN, DAVID
- DEWI WYN o ESSYLLT - gweler DAVIES, THOMAS ESSILE
- DIC ABERDARON - gweler JONES, RICHARD ROBERT
- DIC DYWYLL - gweler WILLIAMS, RICHARD
- DIC PENDERYN - gweler LEWIS, RICHARD
- DIC TRYFAN - gweler WILLIAMS, RICHARD HUGHES
- DIC Y DAWNS - gweler ABRAHAM, RICHARD
- DILLWYN VENABLES-LLEWELYN, Llysdinam Y Bontnewydd ar Wy - gweler DILLWYN
- teulu DILLWYN
- DILLWYN, ELIZABETH AMY (1845 - 1935), nofelydd, diwydiannydd ac ymgyrchydd ffeminyddol
- DILLWYN-LLEWELYN, Llysdinam Y Bontnewydd ar Wy - gweler DILLWYN
- DINEFWR, 7fed Barwn - gweler RHYS, WALTER FITZURYAN
- DINEFWR, 8fed Barwn - gweler RHYS, WALTER FITZURYAN
- DINELEY, THOMAS (bu farw 1695), teithiwr
- DINGLEY, THOMAS - gweler DINELEY, THOMAS