Prosper Graf zu Castell-Castell German officer and Knight's Cross recipient (1920-1989) (1920–1989) Parents Sibylle Prinzessin Reuss zu Köstritz Wolfgang Friedrich Juluis Magnus Graf zu Castell-Castell Children Heinrich Graf zu Castell-Castell Johannes Friedrich Graf zu Castell-Castell Siblings Friedrich Ludwig Graf zu Castell-Castell Partners Elisabeth Ilka Friederike Anna-Luise Prinzessin zur Lippe-Weissenfeld