Surname Сундя (Sundya 
, Sundia 
, Sundja 
) , in the entire world, is a rare family name. The last name Сундя is characteristic of Estonia, where it is quite a rare surname, Latvia, where it is a rare surname, and Philippines, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Philippines, Indonesia, and Estonia. Also, Сундя is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sundya | United States, India, Nigeria |
| Sundia | United Kingdom, United States, India, Indonesia, Philippines |
| Sundja | Estonia, Australia, Latvia, United States, Indonesia |
| Сундя | Russia |