Cognomen Хироя (Hiroya 
, Hiroja , Хироя 
) , throughout the world, is a rare family name. The cognomen Хироя is habitual in Singapore, where it is a rare surname, Japan, and Indonesia, where it is a very rare surname. In absolute terms, the name is most common in China, Japan, and Indonesia. Also, Хироя is the forename as well as the last name.