There were several kings of Strathclyde, Cumbria or Alt Clut whose names are sometimes given as Owain, Owen, Eógan and so on.
- Eugein I of Alt Clut (Eugein son of Beli) (7th century), king of Alt Clut who defeated Domnall Brecc at Strathcarron in 642
- Eugein II of Alt Clut (Eugein son of Dumnuagal) (8th century), king of Alt Clut
- Owen I of Strathclyde (sometimes identified as Eógan son of Domnall) (10th century), king of Strathclyde thought to have died at the Battle of Brunanburh in 937
- Owen the Bald (11th century), king of Strathclyde who may have died at the Battle of Carham in 1018