|MacAslan||Very rare: Belfast. Ir. ? Mac Caisealáin. See Mac Causland.|
|MacAusland||rare: Down-Tyrone. See Mac Causland.|
|MacCausland||numerous: E Ulster, Tyrone-Donegal etc. Ir. Mac Caisealáin (SGA), from caiseal, a stone fort. However, this name is also Scottish and Black quotes one Absolon of the Buchanan country as origin. Macauslan was long associated with Dumbarton. SS.|
Parishes where Causland and a second surname are found together
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