"Louis Rudolph (German: Ludwig Rudolf; 22 July 1671 – 1 March 1735), a member of the House of Welf, was Duke of Brunswick-Lüneburg and ruling Prince of Wolfenbüttel from 1731 until his death. Since 1707, he ruled as an immediate Prince of Blankenburg.
Louis Rudolph was the maternal grandfather of Empress Maria Theresa I, The Holy Roman Empress, Emperor Peter II of Russia and also Charles I, Duke of Brunswick-Wolfenbüttel." - (en.wikipedia.org 27.10.2020)
