| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 881 | Maonaigh | Irish | Wealthy. | M | |
| 882 | Marcas | Irish | Of Mars. The Roman fertility god Mars for whom March was named. | M | |
| 883 | Marmaduke | Irish | Servant of Madoc (fortunate). | M | |
| 884 | Maughold | Irish | Name of a saint. | M | |
| 885 | Mccoy | Irish | Surname. | M | |
| 886 | Meade | Irish | Honey wine or meadow. | M | |
| 887 | Meadhra | Irish | Happy. | M | |
| 888 | Meara | Irish | Happy. | M | |
| 889 | Melrone | Irish | Serves Saint Ruadhan. | M | |
| 890 | Melvin | Irish | Chief. | M | |
| 891 | Melvyn | Irish | Chief. | M | |
| 892 | Micheal | Irish | Form of Michael 'Who is like God?'. | M | |
| 893 | Mick | Irish | Diminutive form of Michael 'Who is like God?'. | M | |
| 894 | Mickey | Irish | Diminutive form of Michael 'Who is like God?'. | M | |
| 895 | Miles | Irish | Servant. | M | |
| 896 | Mitch | Irish | Form of Michael 'Who is like God?'. | M | |
| 897 | Mitchel | Irish | Form of Michael 'Who is like God?'. | M | |
| 898 | Mitchell | Irish | Form of Michael 'Who is like God?'. | M | |
| 899 | Mogue | Irish | Name of a saint. | M | |
| 900 | Molan | Irish | Servant of the storm. | M | |