Dyfnwal I of Strathclyde

Who is Dyfnwal I of Strathclyde?

Dyfnwal I was ruler of the Kingdom of Strathclyde for some period in the early tenth century, and perhaps the late ninth century. He is known only from the Chronicle of the Kings of Alba, which states that "in this time Doneualdus king of the Britons died". "This time" refers to the reign of king Causantín mac Áeda after 908, but before 916. Dyfnwal was presumably a relative of Eochaid, either through the dynasty of Kenneth MacAlpin or the native British dynasty of Run, but nothing of this is known for certain. However, the fact that the Chronicle of the Kings of Alba reports his death, rather than anything else, means we known for certain he was different from Dyfnwal II, a later Strathclyde king.