Overview
Johanna Magdalena of Saxe-Altenburg (14 January 1656 in Altenburg – 22 January 1686 in Weißenfels) was a member of the House of Wettin. She was a Duchess of Saxe-Altenburg by birth and by marriage a Duchess of Saxe-Weissenfels-Querfurt.
Life
The last member of the Saxe-Altenburg line
Johanna Magdalena was the only daughter of Duke Frederick William II of Saxe-Altenburg and his wife Magdalene Sibylle of Saxony, the daughter of Elector John George I of Saxony.
She became an orphan at an early age when her parents died in 1668 and 1669. She quickly became a pawn in the hands of her family. In 1671, her uncles John George II and Maurice, in whose residences she frequently stayed, decided that for dynastic reasons, she would marry her cousin, Duke John Adolph I of Saxe-Weissenfels.
From Wikipedia (CC BY-SA 4.0).