a Portuguese theologian, was born of noble parentage, Aug. 22, 1626, in the isle of St. Michael, Azores. In 1643 he was sent to Portugal to study at Evora and other Portuguese highschools, and after taking holy orders became one of the confessors of the king. He greatly served papal interests, and was distinguished by pope Clement XI with the title of "the venerable." Quental introduced the "Congregation of the Oratory," and in other ways strengthened Romanism. He died at Lisbon, Dec. 20, 1698. His principal works are, Meditacoes (Lisb. 166695, 6 vols. 8vo): — Sermoes (ibid. 1692, 4to). See Kiceron, Memoires, vol. xlii. — Hoefer, Nouv. Biog. Generale, xli, 300.