Family name Kosaca (Kosaca 
) , throughout the world, is a very rare cognomen. The family name Kosaca is habitual in Peru, where it is a very rare surname, Germany, and Turkey, where it is an extremely rare surname. Much less frequently, Kosaca is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kosaca | Germany, Turkey, Peru, Argentina, Brazil |
| taletta kosaca German association football player, DE |
|