Family name รู (Ru 
, Ruh , Roue 
) , throughout the world, is a widespread surname. The last name รู is habitual in Malaysia, where it is a common surname, Switzerland, where it is quite a rare surname, and Singapore. Not in comparison with a country's population, it is the most numerous in China, Malaysia, and India. Likewise, รู is the forename as well as the last name.