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.
fairly rare: Armagh-Down etc. A variant of Lilley.
rare: Ulster. See Lilley.
Lilley: cuíosach líonmhar: Cúige Uladh. Clann a bhain le Mag Uidhir, Fear Manach.MIF.