- EINION ab EINION CLUD (d. 1191) - see ELSTAN GLODRYDD
- EINION ap ANARAWD ap GRUFFYDD (d. 1163) - see ANARAWD ap GRUFFYDD
- EINION ap COLLWYN (fl. 1100?), prince and warrior
- EINION ap GWALCHMAI (fl. 1203-1223), poet
- EINION ap GWGON (fl. c. 1215), one of the poets of the Age of the Princes
- EINION ap MADOG ap RHAHAWD (fl. c. 1237), one of the poets of the Age of the Princes
- EINION CLUD - see ELSTAN GLODRYDD
- EINION fab ANARAWD ap GRUFFYDD (d. 1163) - see ANARAWD ap GRUFFYDD
- EINION MÔN - see LLOYD, JOHN
- EINION OFFEIRIAD (fl. c. 1320), the person whose name is associated with the earliest Welsh grammar or metrical grammar which we possess
- EINION WAN (fl. 1230-1245), poet
- EIRUG - see DAVIES, TOM EIRUG
- EIRWYN PONTSHÂN - see JONES, GWILYM EIRWYN
- EL KAREY, YOUHANNAH (1843/4 - 1907), missionary
- ELDRIDGE, MILDRED ELSIE (1909 - 1991), artist
- ELEANOR DE MONTFORT (c. 1258 - 1282), princess and diplomat
- ELFED - see LEWIS, HOWELL ELVET
- ELFODD (d. 809), bishop
- ELFYN - see HUGHES, ROBERT OWEN
- ELFYNYDD - see KENWARD, JAMES
- ELIAB - see WALTERS, DAVID EUROF
- ELIAS, DAVID (1790 - 1856), preacher and schoolmaster
- ELIAS, JOHN (1774 - 1841), Calvinistic Methodist minister, and famous preacher
- ELIAS, JOHN ROOSE (Y Thesbiad; 1819 - 1881), poet and prose writer
- ELIAS, THOMAS (Bardd Coch; 1792 - 1855), Calvinistic Methodist minister and hymn-writer
- ELIAS, WILLIAM (1708 - 1787), poet
- ELICE, PETER (d. 1637), lawyer - see ELLICE, ROBERT
- ELIDIR SAIS (fl. end of the 12th century and the first half of the 13th.), a poet
- ELIS ap SION ap MORYS (fl. 15th century), bard
- ELIS CYNFRIG (fl. 1580-1620), poet
- ELIS DRWYNHIR (fl. c. 1600?), poet
- ELIS GOCH, poet
- ELIS o'r NANT - see PIERCE, ELLIS
- ELIS WYN o WYRFAI - see ROBERTS, ELLIS
- ELIS Y COWPER - see ROBERTS, ELIS
- ELISE - see CYNGEN
- ELISE JOHN Y GWEHYDD, weaver
- ELIUD Saint (fl. 6th cent) - see TEILO, Saint
- ELLI (fl. 6th century), saint
- ELLICE, PETER (d. 1719), J.P. - see ELLICE, ROBERT
- ELLICE, ROBERT, Royalist soldier
- ELLICE, THOMAS, governor of Barbados - see ELLICE, ROBERT
- ELLIOT, Sir GEORGE (1815 - 1893), BARONET, owner and developer of coalmines
- ELLIS family Bron y Foel, Ystumllyn, Ynyscynhaearn
- ELLIS BRYN-COCH - see ELLIS, ELLIS OWEN
- ELLIS BRYNCOCH - see ELLIS, ELLIS OWEN
- ELLIS SION SIAMS (fl. 17th century), harpist
- ELLIS, ALICE (1730 - 1808), Moravian - see GRIFFITH, WILLIAM
- ELLIS, DAVID (1736 - 1795), cleric, poet, translator, and transcriber of manuscripts
- ELLIS, DAVID - see NANNEY, DAVID ELLIS