Sources: A. Roots 178; Young; Kraentzler 1151a, 1447; History of Morgan Family. Also spelled Gualadis. K: Gwaladus (Gladys) verch Rhiwallon.. Young: Gwladus of Powys. Morgan, Dennis. _A History of the Morgan Family_. Bartrum, Peter C. _Welsh Genealogies, AD 300-1400_. University of Wales Press, 1978; "Rhys ap Tewdwr 1", pages776 and 47 (Powys).
Her marriage to Walter Fitz Other is indicated in many sources.However it is not backed by Burke's Peerage. Additionally her daughter Nesta is documented to be the wife of Walter's son Gerald Fitz Walter which would not have been likely if Gerald's mother were Gwladus. She may have been mother of some of Walter's children, instead of Beatrice.