Heidanus, Abraham

, a learned protestant divine, professor of theology at Leyden, was born August 10, 1597, at Frakenthal, in the palatinate. He acquired great reputation by his sermons and writings; was the intimate friend of Descartes, and died at Leyden, October 15, 1678, leaving several children. Heidanus was author of a “System of Divinity,” 1686, 2 vols. 4to, and other valuable works; among them, “An Examination of the Remonstrant’s Catechism,” 4to, “De origine Erroris,” &c. ¹