Family name Руар (Rouart 
, Rouard 
, Руар 
) , around the world, is quite a rare cognomen. The surname Руар is characteristic of Belgium, where it is quite a rare surname, France, and Canada, where it is a very rare surname. Measured by absolute frequency, it is commonest in France, Belgium, and China. Much less frequently, Руар is the forename as well as the last name.