Principality of Brunswick-Wolfenbüttel
Its first member was Ferdinand Albert I of Brunswick-Lüneburg (1636–1687), the fourth son of Duke Augustus the Younger, ruling Prince of Brunswick-Wolfenbüttel. Upon the death of his father in 1666 and a lengthy dispute with his elder brothers, Ferdinand Albert I received Bevern Palace near Holzminden as part of his inheritance. In turn, he had to waive all rights and claims to rule in the Welf Principality of Brunswick-Wolfenbüttel.