Jean Le Fèvre, Fabri, was a hermit of Saint Augustin. On January 23, 1414, he was commissioned, with Jean Fouquerel, to correct the psalters. He was present at the reception of Pierre Cauchon as Bishop of Beauvais.

Licentiate in theology on March 13, 1426, and master on October 15, he was teaching at Paris at the same time as Erard Emengart, Jean Beaupère Nicolas Midi, and Jacques de Touraine. He was pénitencier of the church of Rouen under Monsignor de Luxembourg and he was authorized, as a notable person, to have a key to the library of the Chapter and to work there.

He was named Bishop of Demetriade on January 13, 1451, and died at Rouen in 1463

He appears to have enjoyed a rather considerable reputation as a preacher, and he preached notably against the French on the occasion of the sieges of Meaux and Pontoise. It was he who performed the mass in the choir of Nôtre Dame at the time of the death of Cardinal de Luxembourg.

Le Fèvre was one of the most diligent judges at the Trial; he testified in a somewhat embarrassed fashion at the inquiry relative to the Rehabilitation; but it is proved that he showed some zeal in her favor, and that he sat very regularly as a subdelegated judge at the Rehabilitation proceedings.