Last name Исан (Isan 
, Исан 
, Ysan 
) , in the world, is quite a rare cognomen. The cognomen Исан is characteristic of North Macedonia, where it is quite a rare surname, Malaysia, where it is a rare surname, and Romania. In absolute terms, it is commonest in Indonesia, India, and Malaysia. More prevalently, Исан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Isan | Japan, Ethiopia, Malaysia, Indonesia, India |
| Исан | Kazakhstan, Russia, Uzbekistan, Kyrgyzstan |
| Ysan | Spain, Philippines, Malaysia, United States, Brazil |