Dempsey Family History
Dempsey Name Meaning
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 .
Source: Dictionary of American Family Names 2nd edition, 2022