Cognomen Upamar (Upamar 
) , worldwide, is a very rare surname. The cognomen Upamar is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Upamar is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Upamar | India, Thailand |
Krongkarn, and Phithakphong