All over the world, อิสาน (Isan 
, อิสาน 
) is quite a common principally male, but very infrequently girly forename. The first name อิสาน is characteristic of Indonesia, where it is quite a rare predominantly masculine, but very seldom feminine name, Sri Lanka, where it is a rare masculine name, and Japan. In absolute terms, it is the most numerous in India, Indonesia, and Japan. Very seldom, อิสาน is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Isan | Indonesia, Ethiopia, Malaysia, India, Japan |
| อิสาน | Thailand |