Wiki information Cobthach:

Cobthach Cóel Breg
Man, Person

Cobthach Cóel Breg, son of Úgaine Mor, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He took power after murdering his brother Lóegaire Lorc. The story is told that he was so consumed with jealousy for his...

Cobthach mac Gabran
Man, Person

Cobthach mac Gabran, King of Ui Fiachrach Aidhne. Cobthach's place among the early kings is uncertain. He is listed in the genealogies but there is no explicit reference to him in the annals. His reign lies somewhere between the years after 538 and...