Magdalena Sibylla of Hesse-Darmstadt
regent of the Duchy of Württemberg and hymn lyricist
Landgravine Magdalena Sibylla of Hesse-Darmstadt (28 April 1652 – 11 August 1712) was a regent of the Duchy of Württemberg from 1677 to 1693 and a prominent German composer of baroque hymns.
Read more about this composer on Wikipedia.