Louis  (RIN: 558), son of Frederick William II and Frederica of Hesse- Darmstadt , was born 1773. He married Frederica of Mecklenburg- Strelitz , Duchess 29 August 1815 in London,England. He died 1796. Frederica of Mecklenburg- Strelitz , Duchess (RIN: 248), daughter of Charles of Mecklenburg- Strelitz and Frederica of Hesse- Darmstadt , was born 02 March 1778 in Hanover,Germany. She died 29 June 1841 in Hanover.