Gustav Ottomar Heinsius von Mayenburg (5 December 1865 – 24 July 1932) was a German pharmacist.
Mayenburg studied botany pharmaceuticals at Leipzig University.
After finishing his university studies he worked as a pharmacist in Dresden.
He was very successful and founded the Leowerke company to sell Clorodont.
At that time, Von Mayenburg lived with his family in the Eckberg Castle near Dresden.