a French Jesuit missionary, was born at Perigueux in 1618. He joined the Jesuits at Bordeaux in Nov. 1635, and was for a while professor of literature and theology in several schools of his order. In 1655 he was sent as missionary to China, and landed at Hian in 1657. China being at that time in revolution, Greslon remained for a while at Hian, learning Chinese in the mean time. After the revolution had ended in favor of Chun-Tchi. Greslon went to the province Of Kiansi, near Pekin, of which he has given a very flattering description. In 1670 he returned to France, where he resumed his former employments, and died in 1697. He wrote Les Vies des saints Patriarches de l'Ancien Testament (with notes in Chinese) : — Histoire de la Chine sons la domination des Tartares, etc. (Paris, 1661, 8vo). See Lettres edifiantes; Moreri, Grand Dict. hist.; Hoefer, Nouv. Biog. Generale, 21:935.