Jonas, a famous Hebrew scholar, was born at Camen in Westphalia, Dec. 25, 1654. He became professor of the Hebrew and Chaldee languages at Basle, where he was settled as a Calvinist minister. He died of the plague, Sept. 13, 1629. His principal works are, a small but excellent Hebrew Grammar, the best edition of which is that of Leyden, 1701, revised by Leusden; A treasure of the Hebrew Grammar; A Hebrew Concordance; several Hebrew Lexicons; Institutio epistolaris Hebraica; De Abbreviaturis Hebræorum, &c.

John, the son of the preceding, and a learned professor of the oriental languages at Basle, distinguished himself, like his father, by his knowledge of the Hebrew language, and his rabbinical learning. He died at Basle in 1664, aged sixty-five. His principal works are, his translation of the More Necochim of Maimonides, and the Liber Cosri; A Chaldee and Syriac Lexicon; An Anti-critique against Capellus; A treatise on the Hebrew Points and Accents, also against Capellus. See CAPELLUS.