Cognomen Исах (Isah 
, Isakh 
, Исах 
) , around the world, is a widespread family name. The last name Исах is habitual in Nigeria, where it is a common surname, India, where it is quite a common surname, and Niger, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Nigeria, India, and Indonesia. Also, Исах is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Isah | Malaysia, Niger, India, Nigeria, Indonesia |
| Isakh | United States, India, Canada, Indonesia, Netherlands |
| Исах | Kazakhstan, Belarus, Kyrgyzstan, Azerbaijan, Russia |
| Ysakh | India |