Family name Ришо (Richaud 
, Ришо 
) , in all the world, is quite a rare cognomen. The cognomen Ришо is characteristic of France, where it is quite a rare surname, Mexico, where it is a rare surname, and Belgium. Not in comparison with a country's population, the name is most common in France, Mexico, and Argentina. Much less frequently, Ришо is the forename as well as the last name.