Surname Isabai (Isabai 
, Исабай 
) , in all the world, is a rare last name. The cognomen Isabai is characteristic of Kyrgyzstan, where it is quite a rare surname, Kazakhstan, and Georgia, where it is a very rare surname. Measured by absolute frequency, the name is most common in Kazakhstan, Kyrgyzstan, and India. More frequently, Isabai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Isabai | Kazakhstan, Georgia, India |
| Исабай | Kazakhstan, Russia, Kyrgyzstan |