Surname Keyffer (Keyffer 
) , across the world, is an extremely rare last name. The family name Keyffer is characteristic of Latin America and the Caribbean, particularly Honduras, where it is a very rare surname, Nicaragua, and Venezuela, where it is an extremely rare surname. Likewise, Keyffer is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Keyffer | Honduras, Brazil, Venezuela, Nicaragua |