Cognomen Rianys (Риана 
, Рианна , Ріанна ) , around the world, is a very rare family name. The cognomen Rianys is habitual in Kyrgyzstan, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Russia, where it is an extremely rare surname. Much more frequently, Rianys is the forename as well as the last name.