Otto Moritz (I) Ludwig von Engelhardt was a Baltic German mineralogist. He was a member of the Engelhardt family. Wikipedia
Born: December 8, 1778, Viisu, Estonia
Died: January 29, 1842 (age 63 years), Tartu, Estonia
Education: University of Göttingen, University of Tartu, and Leipzig University
Parents: Gustav Friedrich von Engelhardt
Grandchildren: Alexander Arvid von Engelhardt, Walter von Engelhardt, Konstantia Gustava Elisabeth von Mühlendahl, and more
Grandparents: Brigitte Eleonore von Engelhardt and Caspar Friedrich von Engelhardt
Great grandchildren: Hellmut von zur Mühlen, Katharina von Grünewaldt, Walter von Gruenewaldt, and more