| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 1381 | Meadhra | Irish | Happy. | M | |
| 1382 | Meara | Irish | Happy. | M | |
| 1383 | Mearr | Irish | Bitter. | F | |
| 1384 | Meave | Irish | Joy. The name of an early queen of Connaught. | F | |
| 1385 | Meeda | Irish | Thirsty. | F | |
| 1386 | Megdn | Irish | Pearl. | F | |
| 1387 | Meghan | Irish | Pearl. | F | |
| 1388 | Melrone | Irish | Serves Saint Ruadhan. | M | |
| 1389 | Melva | Irish | Ruler. | F | |
| 1390 | Melvin | Irish | Chief. | M | |
| 1391 | Melvyn | Irish | Chief. | M | |
| 1392 | Merna | Irish | Beloved. | F | |
| 1393 | Micheal | Irish | Form of Michael 'Who is like God?'. | M | |
| 1394 | Mick | Irish | Diminutive form of Michael 'Who is like God?'. | M | |
| 1395 | Mickey | Irish | Diminutive form of Michael 'Who is like God?'. | M | |
| 1396 | Mide | Irish | Thirsty. | F | |
| 1397 | Miles | Irish | Servant. | M | |
| 1398 | Min | Irish | Smooth; fine; small. | F | |
| 1399 | Mitch | Irish | Form of Michael 'Who is like God?'. | M | |
| 1400 | Mitchel | Irish | Form of Michael 'Who is like God?'. | M | |