Surname Реньо (Regnault 
, Regnaud 
, Реньо 
) , globally, is quite a common last name. The cognomen Реньо is habitual in France, where it is quite a rare surname, Mauritius, and Venezuela. In absolute terms, it most frequently occurs in France, Venezuela, and the United States. Much less frequently, Реньо is the forename as well as the last name.