| Families |
Ethnic Group |
Branch of |
| Martin |
IVL - Ireland, Hebrides |
|
| Martin |
Normans |
Tribes of Galway |
| Martin |
|
O'Neill (Ulster) |
| Masterson, MacMaster |
IVL - Ireland, South Scotland |
|
| Matheson |
Cruithne |
|
| Mathison |
IVL - South Scotland |
|
| Mavor |
|
Innes |
| Mawhannon |
|
Buchanan |
| Meikleham |
|
Lamont |
| Melville |
IVL - Ulster |
|
| Melville, Mulville |
|
O'Mulvihil |
| Mentieth |
|
Graham |
| Mentieth |
|
Stewart |
| Menzies |
Normans |
|
| Middleton |
|
Innes |
| Middleton |
IVL - Ireland, South Scotland |
|
| Molloy |
IVL - Ireland |
|
| Moncreiffe |
Gaels |
|
| Monk |
|
O'Monahan |
| Monk |
IVL - Hebrides |
|
| More |
IVL - Munster, Connacht |
|
| Moroney |
|
O'Mulroony |
| Morris |
IVL - Ireland |
|
| Morris, Morrissey |
Normans |
Tribes of Galway |
| Morris |
|
Fitzmaurice (Mayo) |
| Morris |
|
Fitzmaurice (Kerry) |
| Morrison |
|
MacLeod |
| Morrison |
IVL - Ireland, Harris, South Scotland |
|
| Mullen |
IVL |
|
| Munro, Monroe |
|
O'Cahan |
| Munroe, Monroe |
|
O'Mellan |
| Munroe, Monroe |
IVL - Mayo |
|
| Murchison, MacMurchie |
|
Buchanan |
| Murchison, MacMurchie |
|
MacDonald (Clan Donald) |
| Murphy |
|
Kinsella |
| Murphy |
|
O'Morchoe |
| Murphy |
IVL - Ireland |
|
| Murray |
Normans |
|
| Murray |
IVL - Ireland |
|
| Nagle, Nangle |
|
MacCostello |
| Neilson |
|
MacKay |
| Neilson |
IVL - South Scotland |
|
| Nerney |
|
MacInerney |
| Nicholson |
Cruithne |
|
| Nicholson |
IVL - South Scotland |
|
|
