Cognomen 洛依 (洛依 
, Looy 
) , in the world, is quite a rare family name. The family name 洛依 is habitual in Belgium, where it is quite a common surname, Netherlands, where it is quite a rare surname, and Malaysia, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Belgium, Netherlands, and Indonesia. Much less frequently, 洛依 is the forename as well as the last name.