| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 341 | Dyfed | Celtic | From Dyfed. | M | |
| 342 | Ea | Celtic | Fire. | M | |
| 343 | Eburscon | Celtic | Lives near the yew tree estate. | M | |
| 344 | Edan | Celtic | Fire. | M | |
| 345 | Edana | Celtic | Passionate. | F | |
| 346 | Edna | Celtic | Fire. | F | |
| 347 | Efnisien | Celtic | Mythical son of Euroswydd. | M | |
| 348 | Egan | Celtic | Ardent. | M | |
| 349 | Eghan | Celtic | Ardent. | M | |
| 350 | Einion | Celtic | Anvil. | M | |
| 351 | Elgin | Celtic | 'Noble; white.'. | M | |
| 352 | Elgine | Celtic | 'Noble; white.'. | M | |
| 353 | Elidor | Celtic | Mythical monk. | M | |
| 354 | Eljin | Celtic | 'Noble; white.'. | M | |
| 355 | Elsha | Celtic | Noble. | F | |
| 356 | Emrys | Celtic | Celtic form of Ambrose. | M | |
| 357 | Ena | Celtic | Passionate or fiery. | F | |
| 358 | Engl | Celtic | Light. | F | |
| 359 | Enid | Celtic | Spirit. | F | |
| 360 | Eoghann | Celtic | Young. | M | |