Last name Крум (Крум 
, Krum 
, Kroum 
) , globally, is quite a common cognomen. The cognomen Крум is habitual in Bulgaria, where it is quite a common surname, North Macedonia, where it is quite a rare surname, and Lithuania, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Bulgaria, the United States, and Germany. Also, Крум is the forename as well as the last name.