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| Pearson | numerous: Ulster, Midlands etc. Ir. Mac Piarais. English, 17 cent. Son of Piers, (Peter). DBS. |
| Pierson | rare: Belfast area etc. English, son of Piers (Peter). See Pearson. |
Parishes where a Peirson and a second surname married each other.
This list shows total Peirson Roman Catholic marriages by county.
Click on the county to see detail.