Surname Niff (Niff 
) , globally, is a very rare cognomen. The last name Niff is characteristic of Malaysia, where it is a very rare surname, the United States, where it is an extremely rare surname, and China. Likewise, Niff is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Niff | Philippines, Malaysia, Nigeria, United States, China |