In the entire world, Сундя (Sundya 
, Sundia 
, Sundja 
) is a rare gender-neutral forename. The first name Сундя is habitual in India, where it is a very rare unisex name, Indonesia, where it is a very rare boy's name, and Nigeria, where it is an extremely rare epicene name. Likewise, Сундя is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sundya | Nigeria, United States, India |
| Sundia | Philippines, India, United Kingdom, United States, Indonesia |
| Sundja | Latvia, Australia, Estonia, United States, Indonesia |
| Сундя | Russia |