Family name Kosiyatrakul (Kosiyatrakul 
) , across the world, is an extremely rare cognomen. The surname Kosiyatrakul is habitual in Northern America, particularly the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kosiyatrakul | United States |
| arkaphat kosiyatrakul researcher |
|
|
| thumrongsak kosiyatrakul Ph.D. Syracuse University 2010 |
|
Tewintr, Panochawan, Settapong, and Thumrongsak