In 1935 he adopted Prince Heinrich I Reuss of Köstritz (1910–1982), who married his niece Duchess Woizlawa Feodora of Mecklenburg. In August 1945 he was arrested by the Soviet military and disappeared. In 1962 he was declared dead by a court in Büdingen.
The Grand Duchy of Hesse and by Rhine ( German: Großherzogtum Hessen und bei Rhein) was a Grand duchy in western Germany that existed from 1806 to 1918. The grand duchy originally formed from the Landgraviate of Hesse-Darmstadt in 1806 as the Grand Duchy of Hesse (German: Großherzogtum Hessen ).
Prince Henry of Prussia (German: Albert Wilhelm Heinrich; 14 August 1862 – 20 April 1929) was a younger brother of German Emperor William II and a Prince of Prussia. He was also a grandson of Queen Victoria.
The Züschen tomb (German: Steinkammergrab von Züschen, sometimes also Lohne-Züschen) is a prehistoric burial monument, located between Lohne and Züschen, near Fritzlar, Hesse, Germany.
Georg Friedrich, Prince of Prussia, is the current head of the formerly royal Prussian line, while Karl Friedrich, Prince of Hohenzollern, is the head of the formerly princely Swabian line.  County of Zollern
Unofficial Royalty: Elisabeth Henriette of Hesse-Kassel, Electoral Princess of Brandenburg. Elisabeth Henrietta was born November 18, 1661, in Kassel, to William VI, Landgrave of Hesse-Kassel and Hedwig Sophia of Brandenburg. In 1679, she married her cousin, Freidrich, Electoral Prince of Brandenburg, and they had one daughter.
The House of Hesse was founded in 1264 when it separated from the western part of Thuringia as a distinct political entity. In 1567, Hesse was partitioned among the four sons of Landgrave Philip I ("the Magnanimous"). Hesse-Kassel went to the eldest son, William IV ("the Wise).
Prince Otto Heinrich of Schaumburg-Lippe (1854 – 1935), married morganatically Anna von Koppen, had two sons and one daughter Prince Adolf of Schaumburg-Lippe (1859 – 1917), married Princess Viktoria of Prussia, daughter of Friedrich III, German Emperor and Victoria, Princess Royal, eldest daughter of Queen Victoria, no children
Princess Christine Charlotte of Hesse-Kassel, coadjutor Abbess (1766–1779) Frederica Charlotte , Abbess (1764–1802) Prince-Bishopric of Liège ( complete list ) –