Cognomen กุศลสกุล (กุศลสกุล 
, Kusakul , Kusreesakul ) , throughout the world, is a rare family name. The surname กุศลสกุล is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kusakul, กุศลสกุล, Kusreesakul, Kusonsakul | Thailand |
Charity, and Charusakul