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| Ginniff | rare: Belfast. |
| MacAnuff | rare: Down, Belfast. Ir. Mac Condhuibh. See Cunniffe. |
| MacEneff | rare: Dublin etc. Ir. Mac Conduibh. See Mac Endoo. |
| MacEniff | rare: Fermanagh-Tyrone. See Mac Endoo. |
| MacEnuff | Very rare: Newry (Down). Variant of Mac Endoo, q.v. |
| MacNeff | Very rare: Down. Ir. Mac Conduibh. See Cunniffe. |
| MacNiffe | Quite numerous: Leitrim-Sligo etc. Ir. Mac Conduibh. See Cunniffe. |
Parishes where McKenniff and a second surname are both baptised.
This list shows total McKenniff Roman Catholic baptisms by county.
Click on the county to see detail.