[C-D, II, 441] [17]. Marguerite is the major gateway to the upper reaches of the Medieval aristocracy; the Adhémar, the Anduze, de Poitiers, de Bourgogne, etc. As such she is crucial. Her ancestry can be traced through [ES], where she appears in [ES, XIV, 5] [44]. It was [RW] [34] where I first found this link. Without his work, it is unlikely I would have found it on my own.
Her eldest brother married an Agoult. I imagine a mere Baschi d’Aubais was a bit of a let-down.

[C-D, II, 441] [17]. Seigneur en partie de Vitozzo, Squire of Louis, King of Naples. He made several voyages to Italy after the death of his father, and negotiated with his cousins for the rights to the lands of Vitozzo, in 1426, 1428 and 1429. He bought, on 19 April 1422, from Jean de Barras, the Castle of Saint-Estève, and the majority of Thoard, Barras and Tournefort, in the Diocese of Digne in Provence.

His first marriage appears in [ES, XIV, 34] [44] and his second in [ES, XIV, 5].