Colmán mac Cobthaig (died 622)[1] was a king of Connacht from the Ui Fiachrach.
[2] According to the Book of Ballymote he was the grandson of Goibnenn mac Conaill (flor.537), the first Aidne king mentioned in the annals, but Rawlinson Genealogies name his grandfather as Gabrán.
Both the Book of Leinster and the Laud Synchronisms consider him the successor of Uatu mac Áedo (died 600) and give him a reign of 25 and 21 years respectively.
[citation needed] The annals report that in 622 was fought the Battle of Cennbag (Cambo, County Roscommon) where he was slain.
He was defeated by his successor Rogallach mac Uatach (died 649) of the Uí Briúin branch.