Across the world, รัตนพันธ์ (รัตนพันธ์ 
, Rattanapun , Ratnphan ) is a rare epicene forename. The first name รัตนพันธ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare epicene name. Much more frequently, รัตนพันธ์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Rattanapun, รัตนพันธ์, Ratnphan, Rattanapunt | Thailand |
Raattanapan, Radtanapan, Rasttanaphun, Ratanapan, Ratanapant, Ratanapante, Ratanaphan, Ratanaphand, Ratanaphanthakul, Ratanaphun, Ratanaphund, Ratanapun, Ratanapunt, Ratanapuntha, Ratannaphun, Ratanphan, Ratanphand, Ratdhanapun, Rathanapan, Rathanaphun, Rathanapun, Ratnapant, Ratphansan, Rattanabhanthung, Rattanapan, Rattanapanth, Rattanapanyua, Rattanapapan, Rattanaphan, Rattanaphanna, Rattanaphun, Rattanaphund, Rattanaphunt, Rattanapuan, Rattanpun, Rattapan, Rattaphan, Rattapun, Ratthanapan, Ratthanaphan, Ratthanaphun, Ratthanaphunt, Ratthanapun, Ratthapan, Rattnapan, Ratttanaphan, Rettanaphan, and Ruttanphan