Cognomen มงคลสกุล (มงคลสกุล 
) , throughout the world, is a very rare surname. The family name มงคลสกุล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, มงคลสกุล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| มงคลสกุล | Thailand |
Mongkhonsakul, Mongkolsakul, Mongkolyrakool, and Mongkonsakul