Family name Westlen (Westlen 
) , around the world, is a very rare cognomen. The family name Westlen is characteristic of Sweden, where it is a rare surname, Finland, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Westlen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Westlen | Sweden, Finland, Brazil, United States |