Ermessende was the daughter of Bernard V Pelet, who had married Beatrice, daughter of Bernard IV of Melgueil and widow of Berenguer Ramon, Count of Provence.
Ermessende first married Pierre Bermond, lord of Anduze, and they ruled Melgueil from 1170 to 1172 when he died.
Ermessende died in 1176; her will, made shortly before, was heard before the cardinal deacon Raymond des Arènes [Wikidata], Aldebert d'Uzès [Wikidata], bishop of Nîmes, Bernard Ato V, viscount of Nîmes and Agde, and Gui Guerrejat, guardian of William VIII of Montpellier.
After 1176 Raymond VI continued to rule Melgueil until 1190.
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