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| Mac Briartaigh | Mac Brearty: líon beag i dTír Conaill. Truailliú é seo ar Mac Muircheartaigh; tá Mac Murty ar an dul céanna in Oirthear Uladh. MIF. |
| MacBrearty | Quite numerous: Donegal-Derry-Tyrone. Ir. Mac Briartaigh, properly Mac Muircheartaigh, good mariner, usually Mac Murtry, q.v. |
| MacBriarty | Very rare: Belfast. Ir. Mac Briartaigh, see Mac Brearty. |
| MacBrierty | rare: Belfast area. Variant of Mac Briarty, q.v. |
Parishes where a McBrearty and a second surname married each other.
This list shows total McBrearty Roman Catholic marriages by county.
Click on the county to see detail.