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| Crudden | Quite numerous: Fermanagh-Monaghan etc. Ir. Mac Rodáin, rod, strong. SI. |
| Mac Rodáin | Rodden, Mac Crudden: líon beag: Tír Chonaill-Fear Manach. É seo ina ndúiche féin ach tá Mac Crudden líonmhar go maith sa chuid eile de Chúige Uladh. |
| MacCrodden | Very rare: Dublin. See Mac Crudden. |
| MacCrudden | fairly numerous: Donegal-Derry-Antrim-Down etc. Ir. Mac Rodáin, rod, strong. See also Rudden. |
Parishes where McRodden and a second surname are both baptised.