The following is excerpted from a post to SGM, 25 Oct 1999, by Todd Farmerie, which gives some support to the ancestry of Aminiana, although with doubts as to part of it.
From: Todd A. Farmerie (taf2@@po.cwru.edu)
Subject: New article on Toulouse, Rouergue, Comminges, and Carcassonne
Newsgroups: soc.genealogy.medieval
Date: 1999/10/25
Having said that, there are several interesting genealogical connections found in this work, and summarized in three tables at the end. The author follows the series of tenuous theories which make Amuna, wife of Garcia Sanchez, also his second cousin - as daughter of Vulgin I of Angouleme/Perigord by Roselinde, daughter of Bernard of Septimania, Count of Toulouse by Dhouda, daughter of Sancho Loup, Duke and Prince of Gascony. Each of these connections has been discussed here in the past, with the first and last having been given less-than-glowing reviews.