Surname Хираяма (平山 
, Gyozo 
, Hirayama 
) , across the world, is quite a rare family name. The surname Хираяма is characteristic of Hungary, where it is quite a rare surname, Singapore, where it is a rare surname, and Romania. Not in comparison with a country's population, it most frequently occurs in China, Japan, and Brazil. Likewise, Хираяма is the forename as well as the last name.