In La Tavola Ritonda, a relative of Lancelot’s who showed up at King Mark’s court, secured a promise from the king, and asked for the Hebrew Damsel of Thornbush Ford – a maiden loved by both Mark and Tristan.
Brunoro led her away in front of her husband, Lambergus. Tristan tracked him down, challenged him, and fought him to a draw. The maiden chose to return with Tristan.
This role is played by Bleoberis in the Prose Tristan.
Source
La Tavola Ritonda | 1325–1350