Last name Ryzan (Ризан 
, Ryzan 
) , globally, is a very rare cognomen. The cognomen Ryzan is characteristic of Bulgaria, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Kyrgyzstan. Measured by absolute frequency, it most frequently occurs in Bulgaria, Kazakhstan, and Russia. More frequently, Ryzan is the forename as well as the last name.