| Mabon | | - | Welsh, Welsh Mythology | |
| Math | | - | Welsh Mythology | |
| Medraut | | - | Welsh Mythology, Arthurian Romance | |
| Medrod | | - | Welsh Mythology, Arthurian Romance | |
| Modred | | - | Welsh Mythology, Arthurian Romance | |
| Mordred | | - | Welsh Mythology, Arthurian Romance | |
| Myrddin | | - | Welsh Mythology | |
| Nudd | | - | Welsh Mythology | |
| Owain | | O-wien (Welsh, Welsh Mythology) | Welsh, Welsh Mythology, Arthurian Romance | |
| Peredur | | pe-RE-deer (Welsh Mythology) | Welsh Mythology, Arthurian Romance | |
| Pryderi | | - | Welsh, Welsh Mythology | |
| Pwyll | | - | Welsh Mythology | |
| Rhiannon | | hri-AN-ahn (Welsh), ree-AN-ən (English), REE-ən-ən (English) | Welsh, English, Welsh Mythology | |
| Urien | | - | Welsh, Welsh Mythology, Arthurian Romance | |
| Uther | | - | Welsh Mythology, Arthurian Romance | |