Isolde’s mother in La Tavola Ritonda; the wife of King Anguish of Ireland.
She was an experienced healer, and she tried to heal her brother Morholt after his battle with Tristan, but she could not save him. When Tristan was in Ireland incognito, Lotta discovered Tristan’s identity by matching the broken sword piece found in her brother’s head to Tristan’s sword.
Later, Lotta created the love potion for Mark and Isolde that was consumed by Tristan and Isolde.
Lotta’s character is unnamed or called Isolde in other romances.
Source
La Tavola Ritonda | 1325–1350