Constantine, son of Áed (Medieval Gaelic: Constantín mac Áeda; Modern Gaelic: Còiseam mac Aoidh, known in most modern regnal lists as Constantine II; before 879 – 952) was an early King of Scotland, known then by the Gaelic name Alba. The Kingdom of Alba, a name which first appears in Constantine's lifetime, was in northern Great Britain. The core of the kingdom was formed by the lands around the River Tay.