After his grandfather, George I., became king of Great Britain and Ireland in 1714, Frederick was known as duke of Gloucester and made a knight of the Garter, having previously been betrothed to Wilhelmina Sophia Dorothea (1709-1758), daughter of Frederick William I., king of Prussia, and sister of Frederick the Great.
In that year Wagner married Wilhelmina Planer, an actress at the theatre at Konigsberg.
(1772-1844), king of the Netherlands, born at the Hague on the 24th of August 1772, was the son of William V., prince of Orange and hereditary stadtholder of the United Netherlands by Sophia Wilhelmina, princess of Prussia.
In 1791 he married Frederica Wilhelmina, daughter of Frederick William II., king of Prussia, thus cementing very closely the relations between the houses of Orange-Nassau and Hohenzollern.
1796), Henry and William, and two daughters, Wilhelmina, wife of William of Orange, afterwards William king of the Netherlands, and Augusta, wife of William II., elector of Hesse.