Ducado de Brunswick-Wolfenbüttel. El título "Duque de Brunswick y Luneburgo" (en alemán, Herzog zu Braunschweig und Lüneburg) lo ostentaron, desde 1235 en adelante, varios miembros de la Casa de Welf que gobernaron diversos pequeños territorios en el noroeste de Alemania.
Sophie Antoinette of Brunswick-Wolfenbüttel (13/23 January 1724 – 17 May 1802) married Ernest Frederick, Duke of Saxe-Coburg-Saalfeld and had issue. Albert of Brunswick-Wolfenbüttel (1725–1745) died unmarried. Charlotte of Brunswick-Wolfenbüttel (1725–1766) died unmarried.
At age 13 Elisabeth Christine became engaged to the future Charles VI, Holy Roman Emperor, through negotiations between her ambitious grandfather, Anthony Ulrich, Duke of Brunswick-Wolfenbüttel and Charles' sister-in-law, Empress Wilhelmine Amalia, whose father was John Frederick, Duke of Brunswick-Calenberg and thus belonged to another branch of the House of Welf.
Elisabeth Christine became queen dowager upon the death of Frederick the Great on 17 August 1786. She wasn't present at the death of her spouse and hadn't seen him since January of that year, but was given public sympathy for his death because of the popularity she enjoyed among the public, to all of whom, according to Spalding, she was "so dear in her affliction."
Charles William Ferdinand was born in the town of Wolfenbüttel on 9 October 1735, probably in Wolfenbüttel Castle.  He was the first-born son of Charles I, Duke of Brunswick-Wolfenbüttel and his wife Philippine Charlotte.
Duchess Juliana Maria of Brunswick-Wolfenbüttel was born on 4 September 1729 in the town of Wolfenbüttel, the residence of the Brunswick Princes of Wolfenbüttel. She was the 11th child and 6th daughter of the Austrian field marshal Duke Ferdinand Albert of Brunswick-Wolfenbüttel and Antoinette Amalie of Brunswick-Wolfenbüttel.
Prince Carl of Brunswick-Wolfenbüttel was a brother-in-law of King George III of Great Britain. Brunswick-Lüneburg was a duchy that had been divided into several territories, one of which was ruled by George III as the Electorate of Brunswick-Lüneburg (Hanover).