Cognomen Rivar (Rivan 
, Rivar 
) , all over the world, is quite a rare family name. The family name Rivar is habitual in Indonesia, where it is quite a rare surname, Uruguay, where it is a rare surname, and Bangladesh. Not in comparison with a country's population, it most frequently occurs in Indonesia, India, and Bangladesh. More frequently, Rivar is the forename as well as the last name.