Ó Scannláin
Ó SCANNLÁIN—I—O Scanlaine, O Scanlan, O Scanlon, O Scandlon, Scanlan, Scanlon, Scandlon, &c.; 'descendant of Scannlán' (diminutive of Scannal); the name of several distinct families in different parts of Ireland, as: (1) of Sligo, who are the present-day representatives of the ancient family of Ó Scannail of Carbury (see above); (2) of Galway, a branch of the southern Ui Fiachrach and of the same stock as the O'Shaughnessys and O'Heynes; (3) of Cork, who were formerly erenaghs of Cloyne; and (4) of Fermanagh, who were erenaghs of Devenish. At the end of the 16th century, the name was found in all the counties of Munster, being specially common in Cork, Limerick and Kerry. It is now common in Munster and Connacht, but is only rarely met with in the other provinces.
Alphabetical Index to Irish Surnames