Cornac, Jean a French preacher, abbot of Villelvin, was a man of high standing with his ecclesiastical superiors, and became intimate counsellor of the duke of Mayenne. He died in 1614. Historians do not mention him, and his works are unpublished. The National Library has four large volumes of his
Sermons. He was learned in ecclesiastical history. See Hoefer, Nouv. Biog. Generale, s.v.