Family name อุดทอง (Obthong 
, อุดทอง ) , all around the world, is a rare cognomen. The cognomen อุดทอง is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, อุดทอง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อุดทอง, Obthong | Thailand |