To satisfy what dynasty, did the Duchy of Pomerania get partitioned several times who was later granted as a whole and the Principality of Rügen as a fief to the dukes of both Pomerania-Stettin and Pomerania-Wolgast, by a King of Bohemia and the first King of Bohemia to also become Holy Roman Emperor?
Partitions of the Duchy of Pomerania:  However, already in 1348, German king and later emperor Charles IV again granted the Duchy of Pomerania as a whole and the Principality of Rügen as a fief to the dukes of both Pomerania-Stettin and Pomerania-Wolgast, nullifying Brandenburg's claims by granting Imperial immediacy. Charles IV, Holy Roman Emperor:  , Latin: "Carolus IV" ; 14 May 1316 – 29 November 1378), born Wenceslaus, was a King of Bohemia and the first King of Bohemia to also become Holy Roman Emperor.
i don't know