On 17 January 1524 he married
Anna of Brandenburg, a daughter of
Joachim I, Elector of Brandenburg. They had the following children: • Magnus of Mecklenburg (born and died 19 November 1524) •
John Albert I, Duke of Mecklenburg-Güstrow (23 December 1525 – 12 February 1576) •
Ulrich III, Duke of Mecklenburg-Güstrow and Schwerin (21 April 1528 – 14 March 1603) •
George of Mecklenburg (22 February 1529 – 20 July 1552), •
Anna of Mecklenburg (14 October 1533 – 4 July 1602); married
Gotthard Kettler, Duke of
Courland, and had issue. • Louis of Mecklenburg (1535–1535) • John of Mecklenburg (1536–1536) •
Christopher, Duke of Mecklenburg-Gadebusch (30 June 1537 – 4 March 1592); married in 1573 to
Dorothea (1528 – 11 November 1575), daughter of
Frederick I of Denmark and on 14 May 1581 to
Princess Elizabeth of Sweden (5 April 1549 – 20 November 1597) • Sophie of Mecklenburg (10 April 1538 – 1538) •
Charles I, Duke of Mecklenburg-Güstrow and Schwerin (28 September 1540 – 22 July 1610) ==Literature==