Sale of the Seigneurie de Sendos (Saint-Dos) in 1598 by Marie de Sacaze and Jeanne de Belsunce, Grandmother and Mother of Jacques de Bearn, sieur de Bonasse, to Pierre de Lostal, vice-chancellor of Navarre.
"damoiselle Isabeau de Bearn-Bonasse (1628-17 novembre 1652), fille de feu noble Jacques de Bearn, seigneur de Bonasse, et de damoiselle Magdeleine de Laas."
↑ Birth year estimate based on sale of property in 1598 by his Mother (Jeanne de Belsunce) and Grandmother (Marie Sacaze), assuming he was still in his minority.