Hi,
It is rather common family name in many countries.Lowest nobility (Freiherr) with origins in Pomerania (Vorpommern).
Rosen ist der Name eines alten deutsch-baltischen Adelsgeschlechts, das dem livländischen Uradel entstammt. Zweige der Familie leben heute vor allem in Deutschland, Schweden, Frankreich, Österreich, Polen, USA, Kanada, Brasilien und Australien.
(Rosen is the name of an old German-Baltic aristocratic family that comes from the Livonian nobility. Branches of the family live mainly in Germany, Sweden, France, Austria, Poland, the USA, Canada, Brazil and Australia).
Das Stammwappen zeigt in Gold drei rote Rosen auf goldenem Grund.
(The family coat of arms shows three red roses on a gold background).
Your silver was made in Vienna,therefore most likely owned by members of Rosen family in either austria or Germany.
Regards