https://fmg.ac/Projects/MedLands/gascbordn.htm#_Toc493834019
BERNARD de Durfort (-[1266/1270]). Seigneur de Clermont-Soubiran ... m GUILLEMETTE, daughter of --- (-after 16 Dec 1270). She is named as present in the 16 Dec 1270 arbitration cited below. Bernard & his wife had four children:
a) BERNARD de Durfort (-before 1270). He is named as deceased in the 16 Dec 1270 arbitration cited below. m CONDORS de Turenne[94], daughter of ---. Raymond Bernard & his wife had children:
i) GUILLEMETTE de Durfort (-1304) .... m (after 16 Dec 1270) JOURDAIN [V] de l’Isle-Jourdain, son of [JOURDAIN de l’Isle-Jourdain & his wife Faydide ---] (-[1299/1304]). Seigneur [Comte] de l’Isle-Jourdain.