Ursula of Brandenburg Duchess consort of Mecklenburg-Schwerin (1488–1510) Parents Margaret of Thuringia John Cicero, Elector of Brandenburg Children Sophie of Mecklenburg-Schwerin Magnus III, Duke of Mecklenburg Ursula of Mecklenburg Siblings Anna of Brandenburg Albert of Mainz Joachim I Nestor, Elector of Brandenburg Partners Duke Heinrich V, Duke of Mecklenburg-Schwerin