Cognomen Кайнер (Kiner 
, Kainer 
, Kayner 
) , worldwide, is quite a rare surname. The cognomen Кайнер is characteristic of Austria, where it is quite a rare surname, the United States, where it is a rare surname, and Germany. Very seldom, Кайнер is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kiner | Germany, United States, Poland, Argentina, France |
| Kainer | Germany, Austria, United States, Argentina, France |
| Kayner | Germany, Brazil, United States, Peru, Venezuela |
| Кайнер | Kazakhstan, Russia, Ukraine |