William, Duke of Brunswick (German: Wilhelm August Ludwig Maximilian Friedrich; 25 April 1806 – 18 October 1884), was ruling duke of the Duchy of Brunswick from 1830 until his death. William was the second son of Frederick William, Duke of Brunswick-Lüneburg , and after the death of his father in 1815, was under the guardianship of King George IV of the United Kingdom .
Waldeck was a county within the Holy Roman Empire from 1180. The ruling counts were a branch of the Counts of Schwalenberg (at Schwalenberg Castle). Waldeck Castle (Waldeck), overlooking the Eder river at Waldeck and first mentioned in 1120, was inherited by count Widekind I of Schwalenberg and his son Volkwin, from the counts of Itter and the counts of Ziegenhain, when they married wives of ...
When Albert died in 1170, his son Bernard, who received the title of duke of Saxony in 1180, became count of Anhalt. Bernard died in 1212, and Anhalt, separated from Saxony, passed to his son Henry I, who in 1218 took the title of prince and was the real founder of the house of Anhalt. Princes of Anhalt
Frederick William IV 15 October 1795 – 2 January 1861 (aged 65) 7 June 1840: 2 January 1861: Son of Frederick William III; also President of the Erfurt Union (1849–1850) Hohenzollern: Wilhelm I 22 March 1797 – 9 March 1888 (aged 90) 2 January 1861: 9 March 1888