Last name Ру (Ru 
, Roux , Ру 
) , throughout the world, is a widespread cognomen. The cognomen Ру is habitual in France, where it is a common surname, Malaysia, and Namibia, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in France, China, and Malaysia. Much less frequently, Ру is the forename as well as the last name.