Sancia of Sodden
From Witcher Wiki
Sancia of Sodden was Gutrama's daughter from a second marriage, a princess of Sodden and the half-sister of Ekkehard of Sodden.
She married Medell of Temeria, and thus became the mother of Foltest and Adda and the grandmother of Adda the White.
She did not accept the incestuous relationship of her children; it would've been reason enough to curse the child to become a striga.
