Gabriel de Collanges
Collanges, Gabriel de. Born in 1524. The best astrologer in the XVlth century and a still better Kabbalist. He spent a fortune in the unravelling of its mysteries. It was rumoured that he died through poison administered to him by a Jewish Rabbin-Kabbalist.
Source: H.P.Blavatsky - The Theosophical Glossary