Family name Gajn (Gajn 
) , around the globe, is a very rare last name. The family name Gajn is habitual in Germany, where it is a very rare surname, and India, where it is an extremely rare surname. More prevalently, Gajn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gajn | Germany, India, Pakistan |