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 | Myanmar, Canada, Iraq, France, United States |
| Зифер | Ukraine, Kazakhstan, Russia |
| Zifer | Brazil, United States, Morocco, Germany |
| Siefer | Austria, Canada, France, Germany, United States |
Шияпов, and Бадрутдинов