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| Lilley | Quite numerous: Ulster, Cork etc. Ir. Mac Ailghile. A group related to Maguire Fermanagh. MacLysaght believes that most Lilleys are of this stock, though some may be Scottish as the name does occur there. MIF. |
| Lillie | fairly rare: Armagh-Down etc. A variant of Lilley. |
| Lilly | rare: Ulster. See Lilley. |
| Mac Ailghile | Lilley: cuíosach líonmhar: Cúige Uladh. Clann a bhain le Mag Uidhir, Fear Manach.MIF. |
Parishes where Lilly and a second surname are both baptised.
This list shows total Lilly Roman Catholic baptisms by county.
Click on the county to see detail.