Family name Treesan (Treesan 
) , in the world, is a very rare surname. The last name Treesan is habitual in Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. Much less frequently, Treesan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Treesan | India, Thailand |