Surname Jainaul (Jainaul 
) , in the world, is a very rare last name. The cognomen Jainaul is characteristic of Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. Very seldom, Jainaul is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jainaul | Malaysia, Thailand, India |