|Carroll||Very numerous: all provinces and especially Laois-Kilkenny. Ir. Ó Cearbhaill, Mac Cearbhaill. The personal name Cearbhall is thought to mean "brave in battle". These names relate to a number of septs: e.g. O'Carroll of Ely (Laois) and O'Carroll of Oriel (S Ulster) and MacCarroll of S Leinster. See also (Mac)Carvill. SI,IF & GPN.|
|MacCarroll||numerous: Antrim & Ulster generally. Ir. Mac Cearbhaill (brave in battle) A sept of Ulster noted for musicians. Another sept existed in Carlow-Kilkenny. See also Mac Carville. IF & SGG.|
|MacKarel||rare: Louth-Monaghan. Ir. Mac Fhearghail (SGA). From first name Fearghal, brave. Difficult to distinguish from Mac Carroll, q.v.|
|MacKerell||rare: Belfast area. Ir. Mac Fhearghail (SGA). From first name Fearghal, brave. Some confusion with Mac Cearbhaill (Mac Carroll).|
Parishes where McCarroll and a second surname are found together
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