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.
Lordship of Diepholz The County of Diepholz (West Low German: "Diepholt"), that was first known as the Lordship of Diepholz, was a territory in the Holy Roman Empire in the Lower-Rhenish-Westphalian Circle. It was ruled by the Noble Lords, later Counts, of Diepholz from the late tenth century until 1585, when it was mostly incorporated into the Duchy of Brunswick-Lüneburg.