| Mordecai | | MAWR-də-kie (English) | Biblical, Hebrew | |
| Mordokhay | | - | Biblical Hebrew | |
| Mordred | | - | Welsh Mythology, Arthurian Romance | |
| Morgaine | | - | Arthurian Romance | |
| Morgan (1) | | MAWR-gən (English) | Welsh, English, French | |
| Morgan (2) | | - | Arthurian Romance | |
| Morgane | | - | French | |
| Morgen | | - | Arthurian Romance | |
| Moriah | | mo-RIE-ə (English) | Biblical, Biblical Hebrew, English (Modern) | |
| Morna | | - | Irish, Scottish | |
| Morven | | MAWR-ven | Scottish | |
| Morwen | | - | Cornish, Welsh | |
| Morwenna | | - | Cornish, Welsh | |
| Moses | | MOZ-əs (English) | English, Jewish, Biblical, Biblical Latin | |
| Moshe | | - | Hebrew, Biblical Hebrew | |