a French prelate, was born at Bordeaux in 1685. He studied among the Jesuits, and for some time was very active in the affairs of Jansenism. He was sent to Rome as an ambassador, was consecrated there bishop of Sisteron in 1719, and took possession of his see the following year. He is said to have been immoral early in life, but afterwards a pattern of piety. Lafitau died at Sisteron, April 3, 1764, leaving several works on practical religion, for which see Hoefer, Nouv. Biog. Generale, s.v.