Blumenthal first married on 2 October 1749 Katharina Sophie Auguste von der Groeben (1728–1750), daughter of the minister of state Wilhelm Ludwig
von der Groeben (1690–1760). They had the following children: • Elisabeth Luise Wilhelmine Amalie Henriette (1760–1826), married Freiherr Ernst-Georg von Steinberg-Bodenberg (died 1797) • Friederike Amalie Albertine (born 1765) married Friedrich Heinrich von Podewils (1746–1804) • Ferdinand Friedrich Heinrich Christian (1765–1778) • Charlotte Auguste Johanna Luise (1766–1835) married Valentin von Massow (1752–1817), High Marshal of Prussia und Intendant of the royal palaces; his father (also called Valentin) was a fellow-minister of Joachim von Blumenthal, elevated to the countship in the same year. He married for the second time in 1781 Louise Wilhelmine von Polenz (1740–1792), daughter of Wilhelm von Polenz and Marie Elisabeth von Flanss. ==References==