Colcu mac Connacan
Colcu mac Connacan was an Irish historian and Abbot of Ceann Eitigh.
The Annals of the Four Masters, sub anno 884, contains Colcu's obituary: "Colcu, son of Connacan, Abbot of Ceann Eitigh, doctor of eloquence, and the best historian that was in Ireland in his time... died."