Originally English, from an English place name. The name is well represented in Ireland, where it is on record since the 13th century. There is a place in Co. Louth called Clintonstown from a family who lived there. There is an Irish version of the name, de Cliontún. There is also a less common name, McClinton, which may be Scottish in origin. In Irish this name is MacGiollaFhionntáin. It may sometimes have become Clinton. But remember, most Clintons are English in origin.