John I, Duke of Saxony

German duke (1249–1285)

Parents

• Albert I, Duke of Saxony
• Helene of Brunswick-Lüneburg

Children

• John II, Duke of Saxe-Lauenburg
• Eric I, Duke of Saxe-Lauenburg
• Helena of Saxe-Lauenburg
• Albert III, Duke of Saxe-Lauenburg
• Elisabeth von Sachsen-Lauenburg

Siblings

• Brigitte Jutta of Saxony
• Albert II, Duke of Saxony
• Judith of Saxony
• Helena of Saxony
• Helene von Sachsen
• Agnes von Sachsen
• Bernhard von Sachsen
• Elisabeth von Sachsen

Partners

• Ingeborg Birgersdotter of Bjelbo