Around the globe, Vadan (Vadan 
, Вадан 
) is a common epicene forename. The first name Vadan is habitual in India, where it is a rare gender-neutral name, and Romania, where it is a rare male name. Very seldom, Vadan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Vadan | Spain, Malaysia, India, United States, Romania |
| Вадан | Kazakhstan, Russia, Ukraine |