Last name กูลจันทร์ (กูลจันทร์ 
) , all over the world, is an extremely rare surname. The family name กูลจันทร์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, กูลจันทร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| กูลจันทร์ | Thailand |