Barreto, Francisco a Portuguese ecclesiastic, was born at Montemayor in 1588. He was a Jesuit, and was sent to the Indies as a missionary, where he taught philosophy and theology. As visitor of his society he afterwards went to Malabar and to Goa, and died at the latter place, Oct. 26, 1663. He wrote An Account of Missions in Malabar, in Italian. See Hoefer, Nouv. Biog. Generale, s.v.