Surname Tomoya (Tomoya 
, トモヤ , Томоя 
) , in the entire world, is a common cognomen. The family name Tomoya is characteristic of Japan, where it is quite a common surname, Indonesia, where it is a very rare surname, and China. Very seldom, Tomoya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tomoya | Singapore, Japan, Indonesia, United States, China |
| トモヤ | Japan |
| Томоя | Kyrgyzstan, Russia |