Family name Kahaer (Kahaer 
) , all over the world, is quite a rare last name. The cognomen Kahaer is characteristic of China, where it is a very rare surname, and India, where it is an extremely rare surname. Very seldom, Kahaer is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kahaer | China, India |