Cognomen Risai (Risai 
) , in the entire world, is a very rare surname. The cognomen Risai is characteristic of Hungary, where it is a rare surname, Canada, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Hungary, India, and Canada. More prevalently, Risai is the forename as well as the last name.