Magnus I of Saxe-Lauenburg was a Duke of Saxe-Lauenburg from the House of Ascania. Wikipedia
Born: January 1, 1470, Ratzeburg, Germany
Died: August 1, 1543 (age 73 years), Ratzeburg, Germany
Great-grandparents: Frederick I, Elector of Saxony, Eric IV, Duke of Saxe-Lauenburg, Catherine of Brunswick-Lüneburg, and more
Grandchildren: Magnus II, Duke of Saxe-Lauenburg, Eric XIV of Sweden, Anne of Denmark, Electress of Saxony, and more
Spouse: Catherine of Brunswick-Wolfenbüttel, Duchess of Saxe-Lauenburg (m. 1509–1543)