| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ellis (2) | EL-is | Welsh | ||
| Eluned | el-IN-ed, el-EEN-ed | Welsh | ||
| Emlyn | - | Welsh | ||
| Emrys | - | Welsh | ||
| Emyr | - | Welsh | ||
| Enfys | EN-vis | Welsh | ||
| Enid | - | Welsh, Welsh Mythology, Arthurian Romance | ||
| Ercwlff | - | Welsh | ||
| Esyllt | - | Welsh | ||
| Eurig | - | Welsh | ||
| Eurwen | - | Welsh | ||
| Evan | EV-ən (English) | Welsh, English | ||
| Ffion | FEE-awn, FI-awn | Welsh | ||
| Fflur | - | Welsh | ||
| Ffraid | - | Welsh |