| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Twm | TUWM | Welsh | ||
| Urien | - | Welsh, Welsh Mythology, Arthurian Romance | ||
| Uther | - | Welsh Mythology, Arthurian Romance | ||
| Uthyr | - | Welsh Mythology, Arthurian Romance | ||
| Vaughan | VAWN | Welsh | ||
| Vaughn | VAWN | Welsh, English | ||
| Winifred | WIN-i-frid | Welsh, English | ||
| Winnifred | WIN-i-frid | Welsh, English | ||
| Wyn | WIN | Welsh | ||
| Wynfor | - | Welsh | ||
| Wynn | WIN | Welsh | ||
| Wynne (1) | WIN | Welsh | ||
| Yale | - | Welsh | ||
| Yorath | - | Welsh |