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| Greer | Very numerous: Ulster etc. Ir. Mac Grioghair, equivalent to the Scottish MacGregor. In Ulster 17 cent. Also as Grier and Grierson. MIF. |
| Grier | Quite numerous: Donegal, Mayo, Down. Ir. Mac Grioghair. See Greer. |
| Mac Grioghair | Greer, Grier: an-líonmhar in Ulaidh & rl. Athleagan de Mac Griogair a tháinig anonn sa 17 céad. |
| MacGreer | rare: Dublin. Ir. Mac Grioghair. Analogous with Scots Mac Gregor, q.v. |
Parishes where Greir and a second surname are both baptised.
This list shows total Greir Roman Catholic baptisms by county.
Click on the county to see detail.