To which king was the queen who Sewallis Shirley died serving married?
Sewallis Shirley (1709–1765):  His marriage to the Dowager Countess of Orford ended in divorce after three years, and Shirley spent the last few years of his life as an officer of Queen Charlotte's household. Charlotte of Mecklenburg-Strelitz: Charlotte of Mecklenburg-Strelitz (Sophia Charlotte; 19 May 1744 – 17 November 1818) was by marriage to King George III the Queen of Great Britain and Ireland from her wedding in 1761 until the union of the two kingdoms in 1801, after which she was Queen of the United Kingdom of Great Britain and Ireland until her death in 1818.
King George III