Cognomen Soonkool (Soonkool 
) , globally, is a very rare surname. The cognomen Soonkool is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Soonkool | Thailand |
Phukit, Damrong, Ruttirong, Duangkmon, and Patcharinee