Last name Swetlin (Светлин 
, Swetlin 
) , in all the world, is a very rare surname. The family name Swetlin is characteristic of Bulgaria, where it is a rare surname, and the United States, where it is an extremely rare surname. More prevalently, Swetlin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Светлин | Russia, Belarus, Bulgaria |
| Swetlin | United States |