Family name Flagellum (Flail 
, Flagel 
, Flagellum ) , globally, is a rare surname. The cognomen Flagellum is habitual in France, where it is a rare surname, Canada, and Belgium. Not in comparison with a country's population, it is the most numerous in the United States, France, and Canada. Very seldom, Flagellum is the forename as well as the last name.