Schaaf, Charles a German Orientalist, was born at Huys, electorate of Cologne, in 1646. He was educated at Duisburg, and became professor of Oriental languages in that university in 1677. In 1679 he took the same position in the university at Leyden, where he continued until 1729, when he died of apoplexy. His works are, Opus Armoean. (1686, 8vo): — Novum Testamentum Syriacum, cum Versione Latina (1708, 4to): — Epitome Grammatioe Hebraicoe (1716, 8vo): — Sermo Academicus de Linguarum Orientalium Scientia. In 1711 he prepared a catalogue of all the Hebrew, Chaldee, Syriac, and Samaritan books and MSS. of the Leyden University Library.