Family name Diyanov (Diyanov 
, Диянов 
) , in the entire world, is quite a rare last name. The surname Diyanov is habitual in Russia, where it is a rare surname, Kazakhstan, and Bulgaria. Not in comparison with a country's population, the name is most common in Russia, Kazakhstan, and Romania. Much less frequently, Diyanov is the forename as well as the last name.