Ó Gibealláin
Ó GIBEALLÁIN—I—O Gibbellayne, O Gibbelan, Gibulawn, Giblin, (Gibson, Gibsey, Gipsey); 'descendant of Gibeallán'; the name of a distinguished ecclesiastical family in Connacht, where it is still well known, though sometimes disguised under the anglicised forms of Gibson and Gipsey.
Alphabetical Index to Irish Surnames