Updated June 9, 2019 Share: Boy name origins & meanings Irish : Proud Boy name variations Dempsie Dempsy How Popular Is The Name Dempsey Family name origins & meanings Irish : Anglicized form of Gaelic Ó Díomasaigh ‘descendant of Díomasach’, a byname meaning ‘proud’, ‘haughty’, from díomas ‘pride’. The name was occasionally Anglicized as Proudman (see Proud). Compare McGimsey. Famous people with this last name Patrick Dempsey