Surname อิสาน (Isan 
, อิสาน 
) , all over the world, is quite a rare cognomen. The last name อิสาน is habitual in North Macedonia, where it is quite a rare surname, Romania, where it is a rare surname, and Malaysia. Not in comparison with a country's population, it is commonest in Indonesia, India, and Malaysia. More frequently, อิสาน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Isan | Ethiopia, Malaysia, Japan, India, Indonesia |
| อิสาน | Thailand |