Family name Jainn (Jainn 
) , across the world, is a rare cognomen. The family name Jainn is habitual in Thailand, where it is a very rare surname, Malaysia, and India, where it is an extremely rare surname. Very seldom, Jainn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jainn | Mexico, India, Malaysia, Thailand, United States |