Otto IV was a Duke of Lower Bavaria. Wikipedia
Born: January 3, 1307
Died: December 14, 1334 (age 27 years), Munich, Germany
Great-grandparents: Otto II, Duke of Bavaria, Béla IV of Hungary, Otto V, Margrave of Brandenburg-Salzwedel, and more
Grandparents: Henry XIII, Duke of Bavaria, Bolko I the Strict, Beatrice of Brandenburg, and more
Partner: Richardis of Jülich (1330–)
Parents: Stephen I, Duke of Bavaria and Jutta of Schweidnitz