In all the world, Udayasen (Udayasen 
) is a very rare boy's given name. The forename Udayasen is habitual in Southern Asia, particularly India, where it is an extremely rare boy's name. More prevalently, Udayasen is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Udayasen | Thailand, India |