Cognomen Lerun (Lerun 
, Лерун 
) , throughout the world, is a very rare surname. The surname Lerun is characteristic of France, where it is a very rare surname, Canada, where it is an extremely rare surname, and Philippines. In absolute terms, this name is the most popular in France, Philippines, and the United States. More prevalently, Lerun is the forename as well as the last name.