Family name ليونين (Leunen 
, ليونين) , throughout the world, is a rare surname. The cognomen ليونين is habitual in Belgium, where it is quite a rare surname, Netherlands, where it is a rare surname, and Australia, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Belgium, Netherlands, and the United States. Much less frequently, ليونين is the forename as well as the last name.