Mac Colla
Mac COLLA—IV—M'Colla, M'Collagh, M'Colly, M'Colle, MacCulla, MacCullagh, MacCollough, MacCullough, MacColl, MacCull, &c.; 'son of Colla' (a common personal name among the MacDonnells and Mac Sweeneys); a scattered surname; in the spoken language, sometimes made Mac Collach.
Alphabetical Index to Irish Surnames