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| Jones | Very numerous: all areas, especially Galway. Ir. Mac Seóin. The most numerous name in Wales, it was common amongst settlers from Britain, 16 & 17 cents. |
| Mac Seoin | Jones: líonmhar, i nGaillimh ach go h-áirithe. Inimircigh sa 16 & 17 céad. |
Parishes where Jones and a second surname are both baptised.
This list shows total Jones Roman Catholic baptisms by county.
Click on the county to see detail.