Eugein or Ywain was a ruler of Alt Clut, a Brittonic kingdom based on Dumbarton Rock, sometime in the mid-7th century. According to the Harleian genealogies, he was the son of Beli I, presumably his predecessor as king, and the father of Elfin, who ruled sometime later. The Annals of Ulster and the Annals of Tigernach record another probable son, Dumnagual, who ruled Alt Clut and died in 694. Eugein was probably the brother or half brother of Bridei III of the Picts, the victor at the Battle of Dun Nechtain.
- Occupation
- monarch
- Position held
- list of kings of Strathclyde
- Citizenship
- Kingdom of Strathclyde
- Born
- 612
