Family name ルハン (Luján 
, ルハン) , throughout the world, is quite a rare cognomen. The cognomen ルハン is habitual in Latin America and the Caribbean, particularly Uruguay, where it is quite a rare surname, Bolivia, and Paraguay. Not in comparison with a country's population, the name is most common in Bolivia, Spain, and Colombia. Likewise, ルハン is the forename as well as the last name.