Nicholas V, Duke of Krnov Duke of Racibórz, Krnov, Bruntál, Rybnik and Wodzisław (1409–1452) Parents John II, Duke of Opava-Ratibor Helena Korybutówna Children Barbara of Karniów Wenceslaus III, Duke of Rybnik John IV, Duke of Krnov Małgorzata Siblings Wenceslaus II, Duke of Opava-Ratibor Margareta of Opava-Ratibor Partners Barbara Rockemberg Margaret Clemm of Ellguth