Background
He was the second eldest son of Lorenz, Lord of Werle-Güstrow, and Mechthild (d before 17 December 1402).
He was the second eldest son of Lorenz, Lord of Werle-Güstrow, and Mechthild (d before 17 December 1402).
John married Catherine of Saxe-Lauenburg, a daughter of Erich IV of Saxe-Lauenburg. He had no known children.