The Genealogica Wettinensis names "Adelhidis…[et] Agnes" as the two daughters of "secundus filius [comitis Tiderici] Dedo" and his wife Oda, naming "Hernesto marchioni de Bavaria" as husband of Adelheid and "Luppoldum marchionem" as their son.
The Annales Gotwicenses record the death in 1071 of "Adalheit marchionissa". The necrology of Melk records the death "VII Kal Feb" of "Adalheida marchionissa ux Adalberti marchionis Austrie". At first sight, "Adalberti" [is] assumed to be an error for "Ernesti" as the latter's wife is the only known "marchionissa" of that name.... 1
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