Which son of Sophia of Hanover ruled part of the Holy Roman Empire?
George I of Great Britain George I (George Louis; German: "Georg Ludwig" ; 28 May 1660 – 11 June 1727) was King of Great Britain and Ireland from 1 August 1714 until his death, and ruler of the Duchy and Electorate of Brunswick-Lüneburg (Hanover) in the Holy Roman Empire from 1698.
Wilhelmine Amalia of Brunswick-Lüneburg Wilhelmine Amalia of Brunswick-Lüneburg (21 April 1673 – 10 April 1742) was Holy Roman Empress, Queen of the Germans, Queen of Hungary, Queen of Bohemia, Archduchess consort of Austria etc. as the spouse of Joseph I, Holy Roman Emperor.