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.
Principality of Orange-Nassau Orange-Nassau, also known as Nassau-Orange (German: "Oranien-Nassau" or "Nassau-Oranien"), was a principality which was part of the Lower Rhenish-Westphalian Circle within the Holy Roman Empire. It existed under this name between 1702 and 1815. The territory of the former state of Orange-Nassau is now part of Germany. It was ruled by the House of Orange-Nassau.