Agnes of Glanville

From Witcher Wiki

Agnes of Glanville - the first human woman to become a sorceress. She was a member of the first Chapter and the author of the book Secret of Secrets.

[edit] In The Witcher computer game

Kalkstein mentions an "old friend", Agnes de Glanville when he is discussing making Raven's armor with Geralt. He mentions that her lair is still in one of the ancient crypts in the Swamp Cemetery.