Ottokar IV, Duke of Styria
…previously a margraviate subordinated to the stem duchy of Bavaria, was raised to the status of an independent duchy. He was the only son of Margrave Ottokar III of Styria (1124–1164) and his wife Kunigunde (d. 1184), a daughter of the Bavarian margrave Diepold III of Vohburg and sister-in-law of Emperor Frederick Barbarossa…