C. 988 - C. 1050 JONAH IBN JANAH (Spain)
Physician and Hebrew philologist. He wrote a number of books including one on remedies Kitab al-Talkhis. Ibn Janah is considered the greatest Hebrew philologist of his time. His major work on grammar written in about 1040 was Kitab al-Tanqihor- Sefer ha-Dikduk (Book of Minute Research). It was the first complete clarification of Hebrew vocabulary and grammar, listing most of the roots and their definitions.