Ruchat, Abraham, a Swiss ecclesiastical writer, was born about 1680. He was for a time pastor at Aubonne, but after 1721 taught belles lettres and philosophy in the Academy of Lausanne. He died Sept. 29, 1750. His principal works are, Grammatica Hebraica (Leyden, 1707): — Abrege de l'Histoire Ecclesiastique du Pays de Vaud (Berne, 1707): — Histoire de la Reformation de la Suisse (Geneva, 1740, 6 vols.). See Rousset, Eloge de Ruchat.--Hoefer, Nouv. Biog. Générale, s.v.