Surname 오야마 (Shungo 
, Nobuyo 
, Ojamaa 
) , all around the world, is a rare family name. The cognomen 오야마 is characteristic of Estonia, where it is quite a common surname, Andorra, where it is quite a rare surname, and Finland, where it is a rare surname. In absolute terms, it most frequently occurs in Estonia, Japan, and Senegal. More prevalently, 오야마 is the forename as well as the last name.