Throughout the world, อุดรศักดิ์ (อุดรศักดิ์ 
, Udonsak 
) is a very rare epicene given name. The forename อุดรศักดิ์ is habitual in Thailand, where it is a very rare boy's name, and Nigeria, where it is a very rare unisex name. Very seldom, อุดรศักดิ์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| อุดรศักดิ์ | Thailand |
| Udonsak | Nigeria, Thailand, Canada, United States, United Kingdom |