Cognomen デンプシー (Dempsey 
, Dempsie 
, デンプシー) , in all the world, is a common last name. The surname デンプシー is characteristic of 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). In absolute terms, this name is the most popular in the United States, Ireland, and the United Kingdom. Very seldom, デンプシー is the forename as well as the last name.