Hedwig Sophia of Brandenburg was Landgravine consort of Hesse-Kassel by marriage to William VI, Landgrave of Hesse-Kassel, and regent from 1663 until 1677 during the minority of her sons, William VII, Landgrave of Hesse-Kassel and Charles I, Landgrave of Hesse-Kassel.
- Occupation
- politician
- Position held
- regent
- Born
- July 14, 1623
- Died
- June 26, 1683, June 16, 1683