Around the globe, Hadayan (Hadayan 
) is an extremely rare dominantly masculine, but infrequently female first name. Very seldom, Hadayan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Hadayan | India, Brazil, Malaysia, Philippines |
|
maimon ben yossef hadayan Spanish exegete, moralist and dayyan, ES (b. 1110) |
|