Throughout the world, Undas (Undas 
) is a very rare epicene given name. The forename Undas is habitual in Philippines, where it is an extremely rare masculine name, and India, where it is an extremely rare unisex name. Likewise, Undas is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Undas | Indonesia, Philippines, Mexico, India, Poland |