On 24 June 1749, the Prince married his
first cousin Countess Christiane Wilhelmine Luise of
Solms-Rödelheim and Assenheim (1736–1803), daughter of Wilhelm Carl Ludwig, Count of Solms-Rödelheim and Assenheim (1699–1778), and Countess Maria Margareta Leopolda von
Wurmbrand-Stuppach (1701–1756). His wife died on 6 January 1803. They had four children: • Princess Elisabeth Christiane Marianne of Leiningen (27 October 1753 – 16 February 1792); married on 17 May 1768 to Count Karl Ludwig of
Salm-Grumbach. • Princess Charlotte Luise Polyxena of Leiningen (27 May 1755 – 13 January 1785); married 1 September 1776 to
Franz, Count of Erbach-Erbach. • Princess Karoline Sophie Wilhelmine of Leiningen (4 April 1757 – 18 March 1832); married 21 September 1773 Count Friedrich Magnus I of
Solms-Wildenfels. •
Emich Karl, Prince of Leiningen (27 September 1763 – 4 July 1814); succeeded his father as second Prince of
Leiningen. == Ancestry ==