Conchobar Ua Briain

Conchobar Ua Briain (died 1142) was a mid-twelfth-century ruler of the kingdoms of Munster and Dublin.

Conchobar was a son of Diarmait Ua Briain, King of Munster.

[2] The Annals of the Four Masters reveals that he gained the kingship of Dublin in 1141.

[4] It is believed that Conchobar Ua Briain founded what is now known as Cahir Castle in the early 12th century.

The fortress was a state-of-the-art defensive stronghold at the time, and continued to be in use for hundreds of years after being gifted to the Butler family in 1375 by Edward III.