Last name Tomoyama (Tomoyama 
) , all around the world, is a very rare cognomen. The last name Tomoyama is characteristic of Singapore, where it is a rare surname, and Germany, where it is an extremely rare surname. Also, Tomoyama is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tomoyama | China, Singapore, Germany |