What was the noble family that XXX was from?
Princess Magdalena Augusta of Anhalt-Zerbst
Princess Magdalena Augusta of Anhalt-Zerbst (13 October 1679 -- 11 October 1740) was, by birth, a Princess of Anhalt-Zerbst and, by marriage, a Duchess of Saxe-Gotha-Altenburg.
Saxe-Gotha-Altenburg