Hypatia (Gr.). The girl-philosopher, who lived at Alexandria during the fifth century, and taught many a famous man—among others Bishop Synesius. She was the daughter of the mathematician Theon, and became famous for her learning. Falling a martyr to the fiendish conspiracy of Theophilos, Bishop of Alexandria, and his nephew Cyril, she was foully murdered by their order. With her death fell the Neo Platonic School.
Source: H.P.Blavatsky - The Theosophical Glossary