This Benedictine of Cluny, Bertrand du Chesne, de Quercu, was a licentiate in law in 1416, and dean of Lihons, doctor in 1426 and master regent the year following.

In 1429 he sustained a trial before Parlement against the collège de Cluny at Paris. Pope Eugene IV named him Abbot of Saint Pierre de Hanon in the diocese of Arras in 1439