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| MacCagherty | Very rare: Belfast. Ir. Mac Eachartaigh, variant of Mac Cafferty, q.v. |
| MacCaherty | Very rare: Down. Variant of Mac Cafferty, q.v. |
| MacCaugherty | Quite numerous: Down-Antrim etc. Variant of Mac Cafferty, q.v. |
| MacGaherty | Very rare: Belfast. Ir. Mac Aireachtaigh, possibly. |
Parishes where a Caherty and a second surname married each other.