Ó Longáin
Ó LONGÁIN—I—O Longane, O Langane, O Longan, O Langan, Longan, Langan, Langin, (Long); 'descendant of Longán' (diminutive of long, long, tall); the name (1) of an Ulster family who were anciently chiefs of West Ui Breasail, in Co. Armagh, and are now very numerous in Mayo; and (2) of an ecclesiastical family who were erenaghs of Ardpatrick, in Co. Limerick, and Patrician stewards of Munster. After the destruction of the monastery of Ardpatrick, the family dispersed through Limerick, Kerry and Cork. In the last century, the O'Longans of Cork were a distinguished family of scribes and poets. See Ó Luingeáin.
Alphabetical Index to Irish Surnames