| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 241 | Eilwen | Welsh | Variant of Eilwyn: White-browed. | M | |
| 242 | Eilwyn | Welsh | White-browed. | M | |
| 243 | Einian | Welsh | Anvil. | M | |
| 244 | Einion | Welsh | Anvil. | M | |
| 245 | Einwys | Welsh | Variant of Einion: Anvil. | M | |
| 246 | Elphin | Welsh | Legendary son of Gwyddno. | M | |
| 247 | Elwyn | Welsh | Fair brow. Also a variant of Alvin, meaning noble friend. | M | |
| 248 | Emhyr | Welsh | Ruler. | M | |
| 249 | EmIyn | Welsh | Waterfall. | M | |
| 250 | 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 | |
| 251 | Emrys | Welsh | The Welsh form of the Greek Ambrose, meaning immortal. | M | |
| 252 | Emyr | Welsh | Ruler. | M | |
| 253 | Erbin | Welsh | Legendary son of Custenhin. | M | |
| 254 | ErcwIff | Welsh | Welsh form of Hercules 'Hera's glory'. | M | |
| 255 | Ergyryad | Welsh | Legendary son of Caw. | M | |
| 256 | Eriyn | Welsh | Legendary son of peibyn. | M | |
| 257 | Ermid | Welsh | Legendary son of Erbin. | M | |
| 258 | Erwin | Welsh | White river. | M | |
| 259 | Erwyn | Welsh | White river. | M | |
| 260 | Eryi | Welsh | From Snowdon. | M | |