Cognomen דמפסי (Dempsey 
, Dempsie 
, דמפסי 
) , all over the world, is a common family name. The family name דמפסי is habitual in Ireland, where it is a common surname, Australia, where it is quite a common surname, and Isle of Man (explore the name in all countries). Measured by absolute frequency, it is the most numerous in the United States, Ireland, and the United Kingdom. Much less frequently, דמפסי is the forename as well as the last name.