| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 1361 | Maolruadhan | Irish | Serves Saint Ruadhan. | M | |
| 1362 | Maonaigh | Irish | Wealthy. | M | |
| 1363 | Marcas | Irish | Of Mars. The Roman fertility god Mars for whom March was named. | M | |
| 1364 | Mare | Irish | Bitter. | F | |
| 1365 | Marella | Irish | Shining sea. Variant of Muriel. | F | |
| 1366 | Margaret | Irish | Name of a saint. | F | |
| 1367 | Marilla | Irish | Shining sea. Variant of Muriel. | F | |
| 1368 | Marmaduke | Irish | Servant of Madoc (fortunate). | M | |
| 1369 | Maud | Irish | Strong battle maiden. | F | |
| 1370 | Maude | Irish | Strong battle maiden. | F | |
| 1371 | Maughold | Irish | Name of a saint. | M | |
| 1372 | Maura | Irish | Bitter. | F | |
| 1373 | Maureen | Irish | Bitter. | F | |
| 1374 | Maurine | Irish | Bitter. | F | |
| 1375 | Maurya | Irish | Bitter. | F | |
| 1376 | Mave | Irish | Joy. | F | |
| 1377 | Mayra | Irish | Variant of Maire, a Gaelic form of Mary: bitter. | F | |
| 1378 | Mccoy | Irish | Surname. | M | |
| 1379 | Meade | Irish | Honey wine or meadow. | M | |
| 1380 | Meadhbh | Irish | Happiness or pearl. | F | |