Surname Гааф (Гааф 
, Gaaf 
) , globally, is a rare cognomen. The family name Гааф is characteristic of Kazakhstan, where it is a rare surname, Netherlands, and Germany, where it is an extremely rare surname. Much less frequently, Гааф is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Гааф | Russia, Kazakhstan |
| Gaaf | Netherlands, Kazakhstan, South Africa, United States, Germany |