>
Cognomen Siewert (Siewert , Зиверт ) , all over the world, is quite a common family name. The last name Siewert is characteristic of Germany, where it is quite a rare surname, Poland, where it is a rare surname, and the United States. Measured by absolute frequency, it is commonest in Germany, the United States, and Brazil. Much less frequently, Siewert is the forename as well as the last name.