Below is a list of surnames which have either historic or numeric importance to the counties of Ireland. Of numeric importance include the top surnames from Matheson's birth index study of the 1890 census, with the number of 1890 births cited following the name (in parentheses). The list is not comprehensive and there are many variant spellings of names which are not included. In many cases a root name may appear both with and without the O', Mac, or Mc prefix, for example Connor and O'Connor normally indicates the same surname. Although not always the case, names beginning with O', Mac, Mc, De, Le, and others, may usually indicate a name of historical significance. In addition to indigenous Irish surnames (significantly those beginning with O') the list below also contains names of origin outside of Ireland, including Scottish, Welsh, English, Norse, Norman and Flemish, among others origins.
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County Antrim
Aiken, Bell (90), Bissett, Boyd (81), Brown (82), Burns, Campbell (96), Craig, DeBurgo, DeCourcy, DeLacy, Diamond, Donnelan, Dunluce, Ferguson, Dugan, Earle, Graham (64), Greene, Hall, Hamill, Hamilton (50), Hession, Hoctor, Johnston (126), Kerr (60), Law, Lacy, Lynch, Magee, MacAlister, MacClean, MacCleary, MacCracken, MacCully, MacCurdy, MacDonagall, MacDonnell, MacDougal, MacGee, MacGuigan, MacIntee, MacKeon, MacKinley, MacLaughlin, MacNally, MacNeill, MacNellis, MacQuillan, Martin (61), Maxwell, Miller (86), Moore (96), Murboly, O'Criodan, O'Eric, O'Flynn, O'Furry, O'Hamill, O'Hannon, O'Hara, O'Hood, O'Kane, O'Keevan, O'Kernaghan, O'Lavery, O'Lynn, O'Mulholland, O'Neill (98), O'Quinn, O'Shiel, Quillan, Reid (63), Riordan, Robinson (89), Scott (66), Smith (134), Stewart (126), Thompson (101), Toome, Wallace, Welsh, Williamson, Wilson (119).
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County Antrim
Aiken, Bell (90), Bissett, Boyd (81), Brown (82), Burns, Campbell (96), Craig, DeBurgo, DeCourcy, DeLacy, Diamond, Donnelan, Dunluce, Ferguson, Dugan, Earle, Graham (64), Greene, Hall, Hamill, Hamilton (50), Hession, Hoctor, Johnston (126), Kerr (60), Law, Lacy, Lynch, Magee, MacAlister, MacClean, MacCleary, MacCracken, MacCully, MacCurdy, MacDonagall, MacDonnell, MacDougal, MacGee, MacGuigan, MacIntee, MacKeon, MacKinley, MacLaughlin, MacNally, MacNeill, MacNellis, MacQuillan, Martin (61), Maxwell, Miller (86), Moore (96), Murboly, O'Criodan, O'Eric, O'Flynn, O'Furry, O'Hamill, O'Hannon, O'Hara, O'Hood, O'Kane, O'Keevan, O'Kernaghan, O'Lavery, O'Lynn, O'Mulholland, O'Neill (98), O'Quinn, O'Shiel, Quillan, Reid (63), Riordan, Robinson (89), Scott (66), Smith (134), Stewart (126), Thompson (101), Toome, Wallace, Welsh, Williamson, Wilson (119).
My ipad controls my spellings not me so apologies from it in advance lol