Duffie is an uncommon given name of Scottish origin, derived from the surname Duffy, which is an Anglicized form of the Irish Gaelic 'Ó Dubhthaigh'. The name is thought to have been originally a byname meaning 'dark' or 'black', perhaps referring to someone with dark hair or complexion. It was traditionally used as both a masculine and feminine given name in Scotland.
In 1916 alone, there were 6 individuals named Duffie born annually.