Family name Harnefer (Harnefer 
) , throughout the world, is an extremely rare surname. The surname Harnefer is habitual in Latin America and the Caribbean, particularly Nicaragua, where it is a very rare surname, Honduras, and Venezuela, where it is an extremely rare surname. More frequently, Harnefer is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Harnefer | Peru, Venezuela, Nicaragua, Brazil, Honduras |