Jacques Guesdon, Friar Minor, was the brother guardian of the monastery at Rouen in 1427.

He explained to the Pope that after having been excommunicated by Jean Guesdon, provincial of the order in France, he had studied theology at Paris for eight years, and that the provincial chapter had designated him to "read the Bible." It is, therefore, not very likely that he could have been master of theology by 1431, at least at the University of Paris.

This Cordelier was very active at the Trial.
It is not known what relationship he bore to Laurent Guesdon, lieutenant-general to Raoul Bouteiller, Bailly of Rouen at that time, and later lieutenant-general to the Bailly of Gisors.