Ottokar I, count in Carinthia

Ancestry unknown. Some sources say he was son of Aubert, a count in Bavaria.

MedLands

OTAKAR (-after 907). Graf im Leobental . "Hludowicus…rex" granted property "in valle…Liupinatal in comitatu eiusdem Otacherii" to "Otacharii…comitis nostri filio Arpo" after consulting "fidelium nostrorum Liutpoldi, Arponis, Iringi, Cumpoldi et Paponis comitum" by charter dated 10 Mar 904[194]. "Otacharius comes" was sent with Burkhard Bishop of Passau as royal ambassadors to a customs meeting in the Ostmark in 905[195]. Additions to Bavarian laws dated to [906] name "…Arboni marchioni…nuntios suos Theotmarum archiepiscopum, Purchardum Pataviensis ecclesie presulem et Otacharium comitem…"[196].

• http://fmg.ac/Projects/MedLands/GERMAN%20NOBILITY.htm#Otachardiedaf...

Wikipedia

Wikipedia claims as follows, referring to Ottokar as Ottokar I of Styria. Note differences in maternal and sons names etc compared to Geni:
Ottokar I (died 1064) was the founder of the dynasty of the Otakars. From 1056 to 1064, he was margrave of the Carantanian march, later to be known as the March of Styria (German: Steiermark, after the town of Steyr, where Ottokar was count).

Ottokar is documented as a count in the Bavarian Chiemgau about 1048. By his mother Willibirg of Wels-Lambach he inherited allodial lands and the margravial title in the Traungau region around Steyr. He also served a Vogt (reeve) of Lambach Abbey and co-founder of Admont Abbey. He ended the war against Hungary.

He married Willibirg of Eppenstein, possibly a relative of Duke Adalbero of Carinthia. The later margraves Adalbero and Ottokar II were his sons. The elder Adalbero succeeded his father but fell out with his younger brother Ottokar II during the Investiture Controversy, was banned and finally murdered in 1082.

Preceded by (new creation) Margrave of Styria 1056–1064 Succeeded by Adalbero