According to her Wikipedia article, she was the daughter of Sophia Dorothea of Prussia. "Her siblings included Sophia Dorothea, Duchess of Württemberg, and Philippine, Landgravine of Hesse-Cassel." Her sister Sophia Dorothea had a daughter named Sophia Dorothea who became known as Maria Feodorovna. She married her uncle Prince Augustus Ferdinand of Prussia, a younger brother of her mother, Sophia Dorothea. She was the granddaughter of King Friedrich Wilhelm I of Prussia and Sophia Dorothea of Hanover. She bore seven children, including Princess Louise of Prussia.
From the lost gallery's photostream on flickr; exposure increased in attempt to bring out detail; linear craked paint flaws in background and spots mainly in the background removed with Photoshop. The entire left side and lower right corner were fixed with Photoshop.