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| Mason | numerous: all areas, especially Ulster. Ir. Másún. English occupational name usually of recent introduction in Ireland. SI. |
| Másún | Mason: líonmhar: in Ultaibh ach go h-áirithe. Ceard-ainm as Sasana. |
Parishes where Mason and a second surname are both baptised.
This list shows total Mason Roman Catholic baptisms by county.
Click on the county to see detail.