Family name Kositsornwanee (Kositsornwanee 
) , all around the world, is a very rare cognomen. The last name Kositsornwanee is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kositsornwanee | Thailand |
Kasemsit, Chaiyatorn, and Chanasarin