Last name جاجان (Gagan 
, جاجان 
) , in the entire world, is quite a common family name. The surname جاجان is habitual in Western Asia, particularly United Arab Emirates, where it is quite a rare surname, Qatar, and Syria. In absolute terms, the name is most common in India, Philippines, and Nepal. Much more prevalently, جاجان is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gagan | Nepal, Philippines, India, United Arab Emirates, Indonesia |
| جاجان | Jordan, Syria, Iran, Turkey, Iraq |