Cognomen Klefas (Klefas 
) , all around the world, is a rare surname. The family name Klefas is characteristic of Poland, where it is a rare surname, Germany, where it is a very rare surname, and Canada. In absolute terms, it most frequently occurs in Poland, the United States, and Germany. Also, Klefas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Klefas | Poland, Canada, India, Germany, United States |