| Morgan | Irish | A borrowing from the Welsh, Morgan .. |  |  |
| Morrin | Irish | Anglicized form of Muireann (long-h.. |  | |
| Moss | Irish | A short form of Maurice or Morri.. |  | |
| Muadhnait | Irish | Diminutive form of muadh (noble): h.. | | |
| Mugain | Irish | Derived from mogh (slave). The name.. | | |
| Muireadhach | Irish | Derived from muir (sea), Muiread-ha.. | | |
| Muireann | Irish | Ancient Irish name meaning "lon.. | | |
| Muirgheal | Irish | Compound name composed of the Gaeli.. | | |
| Muirgheas | Irish | Compound name composed from the ele.. | | |
| Muirne | Irish | Gaelic name meaning "beloved, affec.. | | |
| Munchin | Irish | Anglicized form of Mainchin (little.. | | |
| Murchadh | Irish | Ancient name thought to be derived .. | | |
| Muriel | Irish | Anglicized form of the Gaelic Muirg.. | | |
| Murrough | Irish | Anglicized form of Murchadh (sea wa.. | | |
| Myrna | Irish | Anglicized form of Muirne (affectio.. |  | |
| Nainsi | Irish | Gaelic form of Nancy (gracious, ful.. | | |
| Nancy | Irish | Nancy originated as a pet form of N.. | | |
| Naomhan | Irish | Derived from the diminutive form of.. | | |
| Neil | Irish | Anglicized form of Niall, a name of.. | | |
| Neila | Irish | Meaning "champion," it is a feminin.. | | |
| Nelda | Irish | Feminine form of Niall, a name of d.. | | |
| Nessa | Irish | Originally a pet form of Agnes (cha.. | | |
| Nevan | Irish | Anglicized form of Naomhan (little .. | | |
| Nevina | Irish | Meaning "worshiper of the saint" or.. | | |
| Nia | Irish | A familiar form of Neila, meaning.. | | |
| Niadh | Irish | Derived from niadh (a champion) | | |
| Niall | Irish | An ancient name of debated etymolog.. | | |
| Niamh | Irish | Gaelic name derived from niamh (bri.. | | |
| Nicholas | Irish | A borrowing from the English, Nicho.. | | |
| Nicol | Irish | A short form of Nicholas (victory o.. | | |
| Nicola | Irish | Latinate feminine form of Nicholas.. | | |
| Nioclas | Irish | Gaelic form of Nicholas (victory of.. | | |
| Niocol | Irish | A short form of N ioclas (victory o.. | | |
| Noelle | Irish | From the French Noel, which is from.. | | |
| Noirin | Irish | Gaelic form of Noreen, a diminutive.. | | |
