Title in commendam of Jean Duvergier de Haubanne. Born in Bayonne, France in 1581; died in Paris, France in 1643. He was a life-long friend of Cornelius Jansen, the author of the Augustinus, and with him planned to introduce innovations in the dogmas and moral practises of the Church. He led many eminent men to support the movement at its inception, some, like Saint Vincent de Paul, being at first attracted by his asceticism. He was imprisoned by Richelieu, but not so closely that he could not carry on his propaganda. He was a prolific writer and his collected works were published at Lyons in 1679.