Ottokar IV, Duke of Styria (b. 1163)
Ottokar IV (19 August 1163 – 8 May 1192), a member of the Otakar dynasty, was Margrave of Styria from 1164 and Duke from 1180, when Styria, previously a margraviate subordinated to the stem duchy of Bavaria, was raised to the status of an independent duchy.