Cognomen อุดมมงคล (อุดมมงคล 
, Oummongkol , Udommongkol 
) , all over the world, is a rare last name. The cognomen อุดมมงคล is characteristic of Thailand, where it is a rare surname, and Australia, where it is a very rare surname. Much less frequently, อุดมมงคล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oummongkol, อุดมมงคล | Thailand |
| Udommongkol | Australia, Thailand |
Udommongko, and Udommongkon