Sophia of Holstein-Gottorp
…was regent of the Duchy of Mecklenburg-Schwerin from 1603 to 1608. Sophia was the eldest daughter of Duke Adolph of Holstein-Gottorp and his wife Christine of Hesse. She married on 17 February 1588 in Reinbek to Duke John VII of Mecklenburg. John was a weak ruler who was unable to rule his indebted and corrupt…