| Welsh baby names begining from J |
| Jennifer |
 | Fair one. Variant of Guinevere. In Arthurian Mythology Guinevere was Arthur's queen. |
| Jesstin |
 | Variant of Justin 'Just; upright; righteous.'. |
| Jestin |
 | Variant of Justin 'Just; upright; righteous.'. |
| Jestina |
 | Just; upright. Feminine of Justin. |
| Jestine |
 | Just; upright. Feminine of Justin. |
| Jeston |
 | Variant of Justin 'Just; upright; righteous.'. |
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