The House of Platen is a feudal noble family originally from Pomerania. The branch of Platen-Hallermund was a mediatized one and as such was part of the small circle of families that belonged to the High nobility in Germany. History. The family's earliest known ancestor is Otto "cum plata", who was first mentioned in 1252 as Vogt of Jaromar II, Prince of Rügen. https://en.wikipedia.org/wiki/Platen_(Pomeranian_family)