M to W
| M | |
| Magee (103) | Only those from Islay, Kintyre or Antrim and must have originally been a MacKay of Islay (103). |
| Magill (60) | Only those known to have originally been MacGills. |
| Mann (67) | Only those from Lochaber and must have originally been a MACGILLIVANTIC. |
| Manntach (67) | Only those from Lochaber and must have originally been a MACGILLIVANTIC. |
| Marcus (120) | Only those from Kintyre and must have originally been a MACMARCUS. |
| Marcusson (120) | Only those from Kintyre and must have originally been a MACMARCUS. |
| Martin (82) | Only those from Skye or N. Uist, Islay or Kintyre. |
| May | Only those from West Highlands & Islands, mainly Kintyre(154). |
| Mayes | Only those from West Highlands & Islands, mainly Kintyre(154). |
| Mays | Only those from West Highlands & Islands, mainly Kintyre(154). |
| Michael (87) | Only those from West Highlands & Islands and must have originally been a MACMICHAEL. |
| Michaelson (87) | Only those from West Highlands & Islands and must have originally been a MACMICHAEL. |
| Michie (123) | Only those from Lochaber and must have originally been a MACMICHIE. |
| Michison (123) | Only those from Lochaber and must have originally been a MACMICHIE. |
| Milloy (88) | Only those from Kintyre and must have originally been a MACMALUAG. |
| Mitchell (87) | Only those from West Highlands & Islands and must have originally been a MACMITCHELL. Approx. 73% of all Mitchells are of Scots ancestry. |
| Mitchelson (87) | Only those from West Highlands & Islands and must have originally been a MACMITCHELL. |
| Monk (119) | Only those from N. Uist or Benbecula and must have originally been a MACMANECHIN. |
| Murchie (124) | Only those from Islay, Kintyre or Antrim and must have originally been a MACMURCHIE. |
| Murchison (124) | Only those from West Highlands & Islands or Antrim and must have originally been a MACMURCHIE. |
| Murdoch (124) | Only those from West Highlands & Islands or Antrim. |
| Murdochson (124) | Only those from West Highlands & Islands or Antrim. |
| Murphy (124) | Only those from Islay, Kintyre or Antrim and must have originally been a MACMURCHIE. |
| O | |
| O’Brennan (92) | Only those from Islay or Kintyre. |
| (149) O’Brolachain | Only those from Islay or Kintyre. They derive from: Gaelic O'Brolach - "descendant of Brolach". Islay & Kintyre - Clan Donald SOUTH. |
| (150) O’Cahan | Only those from Antrim, Islay or Kintyre. They derive from: Gaelic O'Cathain - "descendant of Cathain". Antrim & Kintyre. Clan Donald SOUTH. |
| (151) O’Docharty | Only those from Islay. They derive from: Gaelic O'Dochartaigh - "descendant of Dochertach". Islay - Clan Donald SOUTH. |
| O’Drain (141) | Only those from Islay or Kintyre. |
| (152) O’Hanley | Only those from S. Uist, Benbecula or N. Uist. They derive from: Gaelic Ua-h-Ainie - "descendant of Ainie". 18th cen. missionaries to S. Uist - CLANRANALD. |
| O’Kane (150) | Only those from Antrim, Islay or Kintyre. |
| O’Kerigan (106) | Only those from Islay or Kintyre. |
| (153) O’Loynachan | Only those from Islay or Kintyre. They derive from: Gaelic O'Luingeachain - "descendant of Longachan". Islay & Kintyre - Clan Donald SOUTH. |
| (154) O’May | Only those from Kintyre. They derive from: Gaelic O'Miadhaigh - "descendant of Maidhach". Kintyre - Clan Donald SOUTH. |
| (155) O’Shannaig | Only those from Islay or Kintyre. They derive from: Gaelic O'Seanaigh - "descendant of Seanach". Harpers to the clan in Kintyre - Clan Donald SOUTH. |
| O’Shannon (155) | Only those from Islay or Kintyre. |
| O’Sheehy (135) | Only those from Ulster or Munster |
| P | |
| Padon (4) | |
| (156) Park | Only those from West Highlands & Islands or Antrim. Clan Donald Parks derive: From Chlann ic Phairce. S. Uist - CLANRANALD. 1 in 20 may be of Clan Donald. |
| Patton (4) | |
| Philip (109) | Only those from Lochaber, Islay or Kintyre and must have originally been a MACPHILIP. |
| Philipson (109) | Only those from Lochaber, Islay or Kintyre and must have originally been a MACPHILIP. |
| Philpot (109) | Only those from Lochaber, Islay or Kintyre and must have originally been a MACPHILIP. |
| Pittullich (109) | Only those from Lochaber, Islay or Kintyre and must have originally been a MACPHILIP. |
| Polson (126) | Only those from West Highlands & Islands. |
| Purcell (138) | Only those from West Highlands & Islands. |
| Q | |
| Queen (127) | Only those from Skye or N. Uist, Islay or Kintyre and must have originally been a MACQUEEN. |
| Quin (10) | Only those from Islay, Kintyre or Antrim and must have originally been a CONN. |
| R | |
| Rainey (131)/(47) | Only those from Lochaber, Islay or Kintyre and must have originally been a MACRANALD (131) or a MACRANIE (47). |
| Ranald (131) | Only those from Lochaber, Islay or Kintyre and must have originally been a MACRANALD. |
| Ranaldson (131) | Only those from Lochaber or West Highlands & Islands. |
| Rankin (132) | Only those from Lochaber and must have originally been a MACRANKIN. |
| Rennie (1310 | Only those from Lochaber, Islay or Kintyre and must have originally been a MACRENNIE. |
| Reoch (90) | Only those from Islay, Kintyre or Jura. |
| Revie (90) | Only those from Islay, Kintyre or Jura. |
| Reynolds (131) | Only those from Lochaber/Keppoch and must have originally been a MACREYNOLDS. |
| Ronald (131) | Only those from Lochaber, Islay or Kintyre and must have originally been a MACRANALD. |
| Ronaldson (131) | Only those from Lochaber, or, West Highlands & Islands. |
| Rorieson (133) | Only those from West Highlands & Islands. |
| Rory (133) | Only those from West Highlands & Islands and must have originally been a MACRORY. |
| S | |
| Samuel (137) | Only those from Islay, Kintyre or Antrim and must have originally been a MACSORLEY. |
| Sanders (2) | Only those from West Highlands & Islands, Antrim or Glengarry and must have originally been an ALEXANDER. |
| Sanderson (2) | Only those from West Highlands & Islands, Antrim or Glengarry. |
| Shannon (155) | Only those from Islay or Kintyre and must have originally been an O'SHANNON. |
| Sharp (81) | Only those from Kintyre, Arran or Bute. |
| Shaw (72) | Only those from Islay or Kintyre and must have originally been a MACILAHEINEY. |
| Sheehy (135) | Only those from Ulster or Munster and must have originally been a MACSHEEHY. |
| Smith (69) | Only one family, from S. Uist, who were originally MACGOWANS. |
| Sorleyson (137) | Only those from Islay, Kintyre or Antrim. |
| Sporran (138) | Only those from Kintyre and must have originally been a MACSPORRAN. |
| Stalker (97) | Only those from Kintyre and must have originally been a MACSTAKER. |
| Sweeney (140) | Only those from Ulster or Munster and must have originally been a MACSWEENEY. |
| T | |
| Taylor (98) | Only those from Islay or Kintyre and must have originally been a MACINTAYLOUR. |
| Train (141) | Only those from Kintyre and must have originally been a MACTREIN. |
| Turner (99) | Only those from Islay and must have originally been a MACINTURNER. |
| Whan (12&0 | Only those from Skye, N. Uist, Islay or Kintyre and must have originally been a MACQUEEN. |
| Whannell (53) | Only those from West Highlands & Islands or Ulster and must have originally been a MACWHANNEL. |
| Whallan (129) | Only those from Antrim, Islay or Kintyre and must have originally been a MACQUILLAN. |
| Wilkie (128) | Only those from Islay or Kintyre and must have originally been a MACQUILKAN. |
| Wilkinson (128) | Only those from Islay or Kintyre. |
| Wright (100) | Only those from West Highlands & Islands and must have originally been a MACINTYRE. |