Last name Rikker (Rikker 
, Риккер 
) , all over the world, is a rare cognomen. The last name Rikker is habitual in Hungary, where it is quite a rare surname, Estonia, and Kazakhstan, where it is a rare surname. In absolute terms, this name is the most popular in Hungary, Russia, and Germany. Much less frequently, Rikker is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rikker | Estonia, Russia, United States, Hungary, Germany |
| Риккер | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |