Agnès was the daughter of Pons VII de Montlaur and Bérengère de Sabran. The date and place of her birth have not been found.
Agnès de Montlaur
Pons VII de Montlaur (->1334)
Guy III de Montlaur
Hippolite dite Polie de Poitiers-Valentinois
Bérengère de Sabran
Rostaing III de Sabran (c1160-1209)
Adalmondie de Mévouillon