Surname Fongrut (Fongrut 
) , in all the world, is an extremely rare cognomen. The family name Fongrut is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, Fongrut is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Fongrut | Thailand |
Suanjan, Suanjun, Pichaya, Sittitham, and Thongnhunui