Cognomen แกลน (Klaen 
, แกลน 
) , around the world, is a very rare last name. The cognomen แกลน is characteristic of Brazil, where it is a very rare surname, Germany, and Thailand, where it is an extremely rare surname. Very seldom, แกลน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Klaen | Germany, Peru, Brazil, United States |
| แกลน | Thailand |