Clydeen is of Scottish origin, derived from the surname MacLeoid, which is an Anglicized form of the Gaelic 'MacLabhrain'. The name translates to 'son of Labhran', with Labhran meaning 'smooth browed' in Gaelic. It is a rare and unique name that may have been used as a given name in some instances.
The name Clydeen shows two peaks of popularity in the late 1940s and early 1950s, with five births each year in 1947 and 1952, resulting in a total of ten births over those years.