Bertrada of Prüm

Bertrada (b. ca. 670 - d. after 721), also called Berthe or Bertree, and perhaps a Merovingian princess, is known to be the mother of Caribert of Laon, with whom she is co-founder and benefactor of the Prüm Abbey. They founded the abbey in 721.

Through Charibert's daughter Bertrada of Laon, wife of Pippin the Younger, Bertrada is the great-grandmother of Charlemagne. Her husband is unknown for certain.

Two alternative solutions to the question of her parentage have been suggested:

She was daughter of the seneschal and Pfalzgraf Hugobert and Irmina of Oeren.
She was daughter of Theuderic III, king of Neustria and Austrasia, and Clotilda of Heristal.

References

Maurice Chaume, "Études carolingiennes I: La famille de saint Guillaume de Gellone", in _Annales de Bourgogne_, vol. I (1929), 27-56 who presents the hypothesis that she was daughter of Theuderic (Thierry).

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