Ernst Bogislaw entered the service of Frederick William , Elector of Brandenburg .
Ernst Bogislaw served as Statthalter of Farther Pomerania from 1665 to 1670 and then as Statthalter of Prussia from 1670 to 1684 .
Ernst Bogislaw entered the service of Frederick William , Elector of Brandenburg , and served as Statthalter of Farther Pomerania from 1665 to 1670 and then as Statthalter of Prussia from 1670 to 1684 .