Cognomen Viderker (Viderker 
, Видеркер 
) , in the world, is a rare last name. The family name Viderker is habitual in Kazakhstan, where it is a rare surname, Russia, and Germany, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Viderker | Germany, Russia |
| Видеркер | Kazakhstan, Russia |