ˈɑːɾəkˌɑːɹ wʌz pətˈɜːnəli ɐ mˈɛmbɚɹ ʌvðə pɹɪmˈɪslɪd dˈaɪnɐsti hˌuːz mˈæɹɪdʒ tə mˈɑːɹɡɹət, dˈʌtʃɛs ʌv ˈɔːstɹiə kˈɑː. wˈʌn θˈaʊzənd tˈuːhˈʌndɹɪd fˈoːɹ wˈʌn θˈaʊzənd tˈuːhˈʌndɹɪd sˈɪksti sˈɪks wʌz ɐnˈʌld.
Ottokar was paternally a member of the Přemyslid dynasty whose marriage to Margaret, Duchess of Austria (ca. 1204 – 1266) was annulled.