John I

Lord of Mecklenburg (1211–1264)

Parents

• Henry Borwin II, Lord of Mecklenburg
• Christina of Sweden

Children

• John II, Lord of Mecklenburg
• Albert I, Lord of Mecklenburg
• Henry I, Lord of Mecklenburg
• Elisabeth of Mecklenburg
• Nicholas III

Siblings

• Pribislaw I
• Nicholas I of Werle
• Henry Borwin III, Lord of Rostock
• Matilda of Mecklenburg
• Margarete|Margareta von Mecklenburg (von Rostock)

Partners

• Luitgarde of Henneberg