Cognomen ルア (Lua 
, Rua , Rúa 
) , in all the world, is a common family name. The family name ルア is habitual in Colombia, where it is quite a common surname, Portugal, and Singapore (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Colombia, Mexico, and the United States. Very seldom, ルア is the forename as well as the last name.