John Erdmann (2 February 1719 – 4 July 1785) married Caroline of Schönaich-Carolath (20 June 1727 – 18 December 1762)
Agnes Sophie (14 May 1720 – 2 August 1791), married Heinrich XXVIII, Count of Reuss-Ebersdorf (30 August 1726 – 10 May 1797) son of Heinrich XXIX, Count of Reuss-Ebersdorf
He later married his second wife, Henriette Eleonore (1 January 1706 – 7 April 1762), daughter of Heinrich XV, Count of Reuss-Lobenstein (1674–1739). They had one son:
Seyfried of Promnitz-Drehna (22 May 1734 – 27 February 1760), married Caroline Wilhelmine Louise (15 July 1733 – 18 February 1766), daughter of Count Charles Frederick Augustus of Lippe-Biesterfeld.