Jean Duval, de Valle, priest of the diocese of Rouen, was a master of arts at Paris in 1403.

Later he was a student of theology under the Abbot of Fécamp; he asked for a canonicate at Meaux in 1422, and in 1425 at the church of Estrain in the diocese of Rouen.

In 1439 he is referred to as a master of theology and took part in the election of the antipope at Bâle.