Family name Calja (Calja 
) , worldwide, is a very rare surname. The cognomen Calja is characteristic of Albania, where it is quite a rare surname, Argentina, where it is a very rare surname, and Greece. Also, Calja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Calja | Canada, India, Greece, Albania, Argentina |
| briken calja Albanian weightlifter, AL (b. 1990) |
|