Domnall Mac Lochlainn
Domnall Mac Lochlainn (died 1241) was the last Mac Lochlainn king of Tír Eoghain. In 1234 he killed the reigning king, Domnall Óc Ó Néill, and seized the kingship, but was deposed in 1238. He won power back after the battle of Carnteel in 1239.
In 1241 Brian Ó Néill and his allies defeated and killed him at Caimeirge; ten of his kindred died with him, and the kingship passed permanently to the Ó Néill.