Family name Hiroya (ヒロヤ 
, Hiroya 
, Хироя 
) , throughout the world, is a common cognomen. The last name Hiroya is habitual in Japan, where it is quite a common surname, Indonesia, where it is a very rare surname, and China, where it is an extremely rare surname. Very seldom, Hiroya is the forename as well as the last name.