Cenn Fáelad mac Colgan (died 682)[1] was a King of Connacht from the Uí Briúin branch of the Connachta.
He was of the branch which developed into the Uí Briúin Seóla, who were centred on Tuam in modern County Galway.
The first mention of Cenn Fáelad in the annals is in the year 653 when the ally of the Ui Fiachrach Aidhne, Marcán mac Tomaini, the king of the Ui Maine was slain in battle in Iarthair Seola by Cenn Fáelad and Máenach mac Báethíne of the Uí Briúin.
[4] The last mention of Cenn Fáelad in the annals is in 682 when he was reputedly assassinated by Ulcha Dearg ua Caillidhe (also known as Redbeard) of the Conmaicne Cuile,[5] a subject tribe of the Seóla region.
Francis Byrne believed this killing was in response to the Uí Briúin policy of subjugation and annexation of subject tribal territories.