Family name Phanusan (Phanusan 
) , around the globe, is a very rare last name. The surname Phanusan is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Phanusan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phanusan | Thailand |
Suchai, and Piranchana