Family name Tongyo (Tongyo 
) , throughout the world, is an extremely rare cognomen. The surname Tongyo is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname, and Philippines, where it is an extremely rare surname. More prevalently, Tongyo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tongyo | Japan, Thailand, Philippines |