Source: Monograph of the Winsor Family
Data from: http://www.tudorplace.com.ar/WINDSOR.htm Stirnet shows Beatrice
not Gwaladus to be the mother and Gwladys verch Gruffydd de Gwynedd to
be his second wife, but the problem of the latter may lie in the Wesh use
of patronymics and place names instead of family names.