Baroness Augusta Juliane was the daughter of the Livonian
Baron Magnus Gustav von Mengden (1663–1726) and his third wife, Dorothea Sophie von Rosen (1690–1773). She participated in the coup that placed
Grand Duchess Anna Leopoldovna in power 1740 and was named the official nurse of
Ivan VI of Russia. She followed Anna Leopoldovna to her prison in
Riga in 1741, but was then separated from her and imprisoned in
Ranenburg. She was released by
Catherine the Great in 1762. == References ==