Mac Conluain
Mac CONLUAIN—IV—M'Anleone, M'Anloyne, M'Collone, M'Colwan, Colvan, Colvin, Colavin, Cullivan, (Colvil, Colville, Collwell, Coldwell, Caldwell, &c.); a corruption of Mac Anluain; the name of a family of the Ui Fiachrach race, formerly seated in the parish of Dromard, Co. Sligo, where O'Donovan found the name under the anglicised form of MacColwan. Before the end of the 16th century, it had passed into Co. Leitrim, and is still found in that county, and in the neighbouring county of Cavan, under strange anglicised forms.
Alphabetical Index to Irish Surnames