Cognomen Лейон (Lejon 
, Лейон) , in all the world, is quite a rare surname. The family name Лейон is characteristic of Sweden, where it is quite a common surname, Belgium, where it is a rare surname, and Norway. Not in comparison with a country's population, this name is the most popular in Sweden, Bangladesh, and France. Very seldom, Лейон is the forename as well as the last name.