| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 341 | Ellylw | Welsh | Legendary daughter of Neol Hang Cock. | F | |
| 342 | Elphin | Welsh | Legendary son of Gwyddno. | M | |
| 343 | Eluned | Welsh | From 'cilun' meaning idol. | F | |
| 344 | Elwyn | Welsh | Fair brow. Also a variant of Alvin, meaning noble friend. | M | |
| 345 | Emhyr | Welsh | Ruler. | M | |
| 346 | EmIyn | Welsh | Waterfall. | M | |
| 347 | Emlyn | Welsh | Industrious. Welsh version of the Latin Aemilianus. Also, from the Welsh place name Newcastle Emlyn. Famous bearer: Welsh actor and dramatist Emlyn Williams. | M | |
| 348 | Emrys | Welsh | The Welsh form of the Greek Ambrose, meaning immortal. | M | |
| 349 | Emyr | Welsh | Ruler. | M | |
| 350 | Eneuawg | Welsh | Legendary daughter of Bedwyr. | F | |
| 351 | Enid | Welsh | Woodlark. Life. From 'enaid,' meaning soul or life. | F | |
| 352 | Enit | Welsh | Woodlark. | F | |
| 353 | Enrhydreg | Welsh | Legendary daughter of Tuduathar. | F | |
| 354 | Erbin | Welsh | Legendary son of Custenhin. | M | |
| 355 | ErcwIff | Welsh | Welsh form of Hercules 'Hera's glory'. | M | |
| 356 | Erdudvyl | Welsh | Legendary daughter of Tryffin. | F | |
| 357 | Eres | Welsh | Wonderful. | F | |
| 358 | Ergyryad | Welsh | Legendary son of Caw. | M | |
| 359 | Eriyn | Welsh | Legendary son of peibyn. | M | |
| 360 | Ermid | Welsh | Legendary son of Erbin. | M | |