Throughout the world, 古山 (Gulshan 
, 古山 
, Furuyama 
) is a widespread unisex first name. The first name 古山 is characteristic of India, where it is quite a common epicene name, Pakistan, and Georgia, where it is quite a rare female name. In absolute terms, this name is the most popular in Southern Asia, particularly India, Pakistan, and Bangladesh. Much less frequently, 古山 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Gulshan | India, Saudi Arabia, Bangladesh, Azerbaijan, Pakistan |
| 古山 | China |
| Furuyama | Brazil, Malaysia, China, United States, Japan |