Last name Тосия (Toshia 
, Toshiya 
, Тосия 
) , in the entire world, is a rare cognomen. The cognomen Тосия is characteristic of Singapore, where it is a rare surname, Georgia, and Israel. In absolute terms, it is commonest in China, Japan, and Indonesia. More frequently, Тосия is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Toshia | Brazil, India, Canada, United States, Indonesia |
| Toshiya | China, Taiwan, United States, Japan, Indonesia |
| Тосия | Russia, Kazakhstan |