Antrim: | 20 | Armagh: | 5 | Belfast city: | 19 | Carlow: | 2 |
Cork: | 3 | Derry: | 7 | Down: | 26 | Dublin city: | 1 |
Fermanagh: | 1 | Kilkenny: | 1 | Leitrim: | 1 | Louth: | 1 |
Monaghan: | 5 | Roscommon: | 1 | Tyrone: | 4 | Westmeath: | 1 |
Mac Tomáis | Thomson: líonmhar: an Dún & rl. Albanaigh arís. |
Thompson | Very numerous: all areas, especially Ulster, Dublin, South East. One of the most numerous non-indigenous names, usually of English origin. |
Thomson | numerous: Belfast area, Down etc. Scottish. |
Parishes where Thomson and a second surname are found together
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