Sorcha

 was a 14th century Irishwoman. She was the wife of Cormac, the mother of Tadhg and the sister-in-law of Niall.

Sorcha and Cormac had Victoria Waterfield stay with them while the Second Doctor and Jamie McCrimmon took care of some business. During this time, their son succumbed to the Black Death, followed by both his parents. (PROSE: Screamager)