Deslyons, Jean a French theologian, was born at Pontoise in 1615. He studied at Paris, entered the ministry, and was made doctor in the Sorbonne. On September 11, 1638, he became dean of Senlis, and continued in office till his death, May 26, 1700. For a list of his numerous writings, see Hoefer, Nouv. Biog, Generale, s.v.