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| Lucas | numerous: Ulster, Dublin & scattered. Ir. Mac Lúcáis. English, from 14 cent onwards. |
| MacLucas | rare: Derry etc. Scots Gaelic Mac Lùcais, from first name Lucas. A Scottish name from Argyle. SS. |
Parishes where a Lucas and a second surname married each other.
This list shows total Lucas Roman Catholic marriages by county.
Click on the county to see detail.