Sibylle Auguste of Saxe-Lauenburg

Sibylle Auguste of Saxe-Lauenburg (Ratzeburg, 1675 – Rastatt, 1733) was Margravine of Baden-Baden.

Unreferenced|date=August 2008Sibylle Auguste was a daughter of Duke Julius Franz of Saxe-Lauenburg and Hedwig of Palatine Sulzbach. After her father's death in 1689, Sibylle Auguste and her sisters were desirable marriage candidates because they had no brothers to succeed their father.

For that reason Sibylle Auguste was married in 1690 by Holy Roman Emperor Leopold I to his famous and loyal Imperial Army commander Louis William, Margrave of Baden-Baden. Although a reigning prince, Louis of Baden-Baden was a retired general, twenty years older than Sibylle Auguste.

They had nine children, but six of them died before the age of seven. Sibylle was nicknamed "the unlucky".

Her children were:
*Leopold Wilhelm Günsburg, (1694 – 1695 in Günsburg)
*Karl Josef, (1697 in Augsburg – 1703 in Schlackenwerth)
*Ludwig Georg Simpert, Margrave of Baden-Baden, (7 June 1702 in Ettlingen – 22. October 1761 in Rastatt)
*Wilhelm Georg Simpert, (1703 in Aschaffenburg – 1709 in Baden-Baden)
*August Georg Simpert, Margrave of Baden-Baden, (14 January 1706 – 21. October 1771 in Rastatt)
*Charlotte, (1696 Günsburg – 1700)
*Wilhelmine, (* 1700 in Schlackenwerth – 1702 in Schlackenwerth)
*Luise, (1701 in Nürnberg – 1707)
*Auguste Marie Johanna, (10. November 1704 in Aschaffenburg – 8. August 1726 in Paris)

After her husband's death in 1707, Sibylle became regent of the Margraviate for her two sons until 1727.

In 1726 her only remaining daughter Auguste died in childbirth.