Commentary
Cawley: "The primary source which confirms the name of Vulgrin’s wife has not been identified. The Chronicle of Adémar de Chabannes records that "Vulgrimnus" inherited "Aginnum...urbem" through "sororem Willelmi Tolosani" whom he had married. The identity of "Willelmi Tolosani" is unclear. The Histoire Générale de Languedoc speculates that he was Guillaume Comte de Bordeaux (whom it calls comte de Toulouse), son of Bernard Marquis de Septimanie and his wife Dhuoda. If that is correct, she was ---, daughter of Bernard Comte d'Autun, Marquis de Septimanie [Toulouse] & his wife Dhuoda --- ([842/44]-). If she was Bernard and Dhouda’s daughter, she is assumed to have been born in [842/44] as the Manual of Dhuoda states that the couple’s second son Bernard was his mother's second child [assuming that female children were not simply ignored by the Manual]. The editors of the third edition of the Histoire Générale de Languedoc suggest that the passage in Adhémar de Chabannes refers "probablement [à] Guillaume comte de Bordeaux" [Duke of Gascony]. Jaurgain suggests that this suggestion is correct, on the basis that Guillaume was the son of “Bertrand comte de Bazas et d’Agen” and therefore entitled to pass Agen to his brother-in-law. Unfortunately, he cites no source which confirms that Bertrand was “comte d’Agen”, nor any source which confirms beyond doubt the co-identity between Bertrand’s son Guillaume and Guillaume Comte [de Bordeaux [Duke of Gascony]. The existence of this “Bertrand” in fact seems based on a misinterpretation by Marca of an undated later charter under which Vulgrin [I]’s grandson Bernard Comte de Périgord restored the abbey of Saint-Sour de Genouillac. “Guillaume comte de Bordeaux” was therefore probably the same person as Guillaume, son of Bernard Comte d’Autun, Marquis de Septimanie, in which case the supposedly revised suggestion in the third edition of the Histoire Générale de Languedoc was in fact the same as the suggestion made in the earlier edition."
Family
ClaimDetailEvidence
FatherBernard, Comte d’Autun, Marquis de Septimanie (~795-844) [S904]
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MotherDhouda (e804-) [S904]
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SpouseVulgrin Comte d’Angoulême (e831-886) 
Child +Guillaume I, Comte de Perigueux et d’Agen (e862-~918) [S904]
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Child +Alduin I, Comte d’Angouleme (e872-916) [S904]
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Attributes
ClaimDetailEvidence
GenderFemale
NameRegelindis
no source
FatherBernard, Comte d’Autun, Marquis de Septimanie (~795-844) [S904]
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MotherDhouda (e804-) [S904]
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Timeline
ClaimDateDetailAgeEvidence
Birth 842 - 844France [S904]
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Sources
IndexTitle
[S904] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Angouleme)" (2006-7 (v1.4 Updated 18 July 2007)) (https://fmg.ac/Projects/MedLands/ANGOULEME.htm).