Surname Yostorn (Yostorn 
) , throughout the world, is an extremely rare last name. The family name Yostorn is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, Yostorn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yostorn | Thailand |
Mala, Triyos, Kongsom, Wongse-Ree, and Wongseree