Cognomen Зифер (Siver 
, Зифер 
, Zifer 
) , all over the world, is quite a rare family name. The surname Зифер is characteristic of Germany, where it is a rare surname, Latvia, and the United States. Not in comparison with a country's population, it is commonest in the United States, Germany, and France. Much less frequently, Зифер is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siver | Canada, Myanmar, United States, Iraq, France |
| Зифер | Kazakhstan, Russia, Ukraine |
| Zifer | Germany, Morocco, Brazil, United States |
| Siefer | Germany, Austria, United States, Canada, France |
Шияпов, and Бадрутдинов