| Baby Name | Meaning | Gender |
|---|
| Llacheu | Arthur's Son | Male |
| Llew | Meaning Unknown | Male |
| Llewelyn | Ruler | Male |
| Lloyd | Gray | Male |
| Lona | Solitary | Female |
| Luc | Light: Illumination. Form Of Luke. | Male |
| Luned | Servant Of Laudine | Female |
| Lyn | "A Cascade."Variants Include Lynn, Linn, Lynna, And Lynne. | Female |
| Lynelle | Variant Of Ancient Welsh Given Name. In Arthurian Legend Lynette Accompanied Sir Gareth On A Knightly Quest. | Female |
| Lynette | Bird | Female |
| Lynn | Dwells By The Torrent | Male |
| Lynne | A Cascade | Female |
| Lynnette | Variant Of Ancient Welsh Given Name. In Arthurian Legend Lynette Accompanied Sir Gareth On A Knightly Quest. | Female |
| Mabon | A Knight | Male |
| Mabyn | Ever Young. | Female |
| Macsen | Variant Of Maximus. Meaning | Male |
| Maddock | Beneficent | Male |
| Maddox | Beneficient | Male |
| Madoc | Beneficent | Male |
| Maegan | | Female |
| Mai | Brightness | Female |
| Mal | Chief | Male |
| Manon | Diminutive Form Of Marie Which Is A Variant Of Mary Bitter. | Female |
| Marc | Form Of Mark. | Male |
| Martyn | Warrior Of Mars. | Male |