JACOB (Ben Naphthali), a famous rabbi of the 5th century: he was one of the principal massorets, and bred at the school of Tiberias in Palestine with Ben Asar, another principal massoret. The invention of points in Hebrew to serve for vowels, and of accents to facilitate the reading of that language, are ascribed to these two rabbis; and said to be done in an assembly of the Jews held at Tiberias, A. D. 476.