Cognomen อุดมทรัพย์ (อุดมทรัพย์ 
, Udomsap 
, Udomsub ) , across the world, is quite a rare surname. The last name อุดมทรัพย์ is habitual in Thailand, where it is quite a rare surname, the United States, where it is an extremely rare surname, and China. Likewise, อุดมทรัพย์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อุดมทรัพย์ | Thailand |
| Udomsub, Udomsap | United States, Thailand |
| Udomsab | China, Thailand |
Adomsap, Audomsub, Eudomsup, Soomsap, Ubomsab, Udomsaph, Udomsapphong, Udomsaprattana, Udomsapthaworm, Udomsapy, Udomshup, Udomsrap, Udomsubsiri, and Udomsup