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Biography
Bertrada (b. ca. 670; d. after 721), also called Berthe or Bertree, and perhaps a Merovingian princess, is known to be the mother of Charibert 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 Short, Bertrada is the great-grandmother of Charlemagne. Her husband is unknown for certain, but Settippani believes that he was a son of an Irmina, in turn a daughter of Hugobert, and Chariveus, Count of Laon.
Bertrada and her husband had three children:
Hardrad (d. after 720)
Charibert of Laon
Weta, married Cario.
Three 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 the daughter-in-law of Irmina (d. ca 704), daughter of Hugobert and Irmina, and her husband Charveus, Count of Laon, brother of Lambert, Count of Hesbaye
She was daughter of Theuderic III, king of Neustria and Austrasia, and Clotilda of Herstal.
The last two possibilities are not mutually exclusive, and are supported by Settipani.