From Wikipedia:
Abraham ben Isaac of Narbonne (c. 1080-85 – 1158) was a Provençal rabbi, also known as Raavad II, and author of the halachic work Ha-Eshkol (The Cluster).
Biography
Abraham ben Isaac was probably born at Montpellier. His teacher was Moses ben Joseph ben Merwan ha-Levi, and during the latter’s lifetime Abraham was appointed president (Av Beth Din) of the rabbinical board of Narbonne – composed of nine members – and was made principal of the rabbinical academy. In the latter capacity he taught two of the greatest Talmudists of Provence – namely, Abraham ben David III, who afterward became his son-in-law, and Zerahiah ha-Levi. Abraham ben Isaac died at Narbonne in 1158.