>
Last name 桐山 (桐山 , Kiriyama , Кияма ) , in the entire world, is a rare cognomen. The last name 桐山 is characteristic of Singapore, where it is a rare surname, Japan, where it is a very rare surname, and New Zealand. In absolute terms, it is the most numerous in China, Japan, and Indonesia. Also, 桐山 is the forename as well as the last name.