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| Mac Tighearnáin | (1) Mac Ternan: líon beag: Sligeach-Liatroim-Fear Manach-Doire; (2) Mac Tiernan: líon beag: Sligeach-Ros Comáin-Liatroim. An sloinne céanna iad araon. Bhí an phríomh-chlann i mBreifne - cinn eile i gConnachta agus Fear Manach. Féach Mac Thighearnáin atá níos líonmhaire. |
| MacTernan | Quite numerous: Sligo, Galway, Leitrim, Derry, Fermanagh. Ir. Mac Tighearnáin. See Mac Tiernan. |
| MacTiernan | Quite numerous: Sligo-Roscommon-Leitrim etc. Ir. Mac Tighearnáin, dimin. of tighearna, lord. Mod. Mac Tiarnáin. |
| Ternan | rare: Fermanagh. Ir. Mac Tighearnáin, tighearna, lord. A sept of Breifne, more frequent as Mac Kiernan, q.v. |
| Tiernan | numerous: all areas, especially Connacht and N Leinster. Ir. Mac Tighearnáin, diminutive of tighearna, lord. A sept of Breifne associated with O'Rourke: see Mac Ternan and Mac Tiernan. Another sept existed in Connacht, connected with O'Connor. |
Parishes where McTiernan and a second surname are both baptised.
This list shows total McTiernan Roman Catholic baptisms by county.
Click on the county to see detail.