Friedrich married Von Hanover, Princess Of England Mary 19 May 1740, Chapel Royal St., Westminster, London, Engl. Mary (daughter of Von Hanover, King Of England George II and Brandenburg, Queen/England Caroline) was born 22 Feb 1723/1725, Leicester House, Westminster, Mddlsx, Engl; died 14 Jan 1772, HANAU, H-Nss, Prss; was buried 1 Feb 1772, HANAU, H-Nss, Prss. [Group Sheet]

1. Prince of Hesse-Cassel Wilhelm was born 25 Dec 1741, Cassel, H-Nss, Prss; died 1 Jun 1742.
2. Elector of Hesse-Cassel Wilhelm I was born 3 Jun 1743, Cassel, H-Nss, Prss; died 27 Feb, Kassel, H-Nss, Prussia; was buried 14 Mar 1821, Kapelle Auf Der, Wilhelmshohe, H-Nss, Prussia.
3. Landgrave of Hesse-Cassel Karl was born 19 Dec 1744, Kassel, H-Nss, Prussia; died 17 Aug 1836, Schloss Louisenl, S-Hlst, Prussia; was buried 30 Aug 1836, Domkirche, Schleswig, S-Hlst, Prussia.
4. Landgrave of Hesse Cassel Friedrich was born 11 Sep 1747, Cassel, H-Nss, Prussia; died 20 May 1837, Frankfurt A. M., Prussia; was buried 23 May 1837, Rumpenheim, Strknb, H-Dr..