Medea, Medra
The lecherous sovereigness of Crudele Castle, where Tristan was imprisoned and his companion, Tessina, was beheaded.
Medeas’s sisters were named Lavina, Agnena, Bresenda, and Pulizena. All were descendants of a pagan queen named Calistra. The name comes from the wife of Jason in classical mythology.
Source
La Tavola Ritonda | 1325–1350