|Mullaghan||rare: Antrim etc. Ir. Ó Maolacháin, diminutive of maol, bald, abrupt. See also Mollaghan.|
|Mulligan||Very numerous: Mainly Ulster, Sligo-Mayo-Roscommon. Ir. Ó Maolagáin, from maol, abrupt. A sept of Donegal, displaced 17 cent. IF.|
Parishes where McMulligan and a second surname are found together
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