Cognomen Yennefer (Yennefer 
) , around the globe, is an extremely rare family name. The surname Yennefer is habitual in Latin America and the Caribbean, particularly Venezuela, where it is an extremely rare surname, and Mexico. More frequently, Yennefer is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yennefer | Mexico, Colombia, United States, Peru, Venezuela |