He was son of the duke Theudebert and Regintrud, the probable daughter of the Seneschal (and Pfalzgraf) Hugobert and Irmina of Oeren.
Hugbert found himself forced to give up parts of his duchy, and for a time, Bavarian laws were pronounced in the name of the Merovingian king Theuderic IV.
This lineage places Odilo within the Agilolfing dynasty, a prominent noble family that ruled Bavaria during that era.
Odilo was a member of the Alemannic noble family of the Huosi, who became closely tied to the Agilolfings through his marriage to Hugbert’s niece, Hiltrud, the daughter of Charles Martel.
He further solidified ties with the Frankish realm while also supporting the continued Christianization of the region initiated under Hugbert’s reign