Family name Tossawan (Tossawan 
) , across the world, is an extremely rare cognomen. Much more frequently, Tossawan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tossawan | Thailand |
Pongsuk, Dangsan, Jaruatthawee, Poolkiew, Yiangyong, Kumphonchate, Petchjood, Jitwasinkul, Yongdeemittapap, Siritanawut, Suwannarat, and Pathomwongkul