D Donata, Countess von Castell-Ruedenhausen *1950 -with spouse Friedrich August Wilhelm, Her. Grand Duke of Oldenburg, Prince of Prussia, *1936- (dghtr of Siegfried 4. Fuerst zu Castell-Ruedenhausen Irene, Countess zu Solms-Laubach) Donata, Countess von Castell-Ruedenhausen *1950 with her children Georg-Friedrich Ferdinand, Prince of Prussia, succeeded his grandfather as head of house *1976 and Cornelie-Cecile Viktoria Irene *1978, Princess of Prussia. My line