In the entire world, 當山 (當山 ) is an extremely rare unknown gender first name. Much less frequently, 當山 is the last name as well as the forename.
Tohyama, Tooyama, Touyama, Toyama, とおやま, 当山, and 桐山
) is an extremely rare unknown gender first name. Much less frequently, 當山 is the last name as well as the forename.