Magna Charta Sureties does not give parents for Agatha. There is a lot of doubt as to her parents are. I have the "classic" ancestor, but others (including Vajay) say it is Liudolf, Margrave of Westfriesland and Gertrudis, daughter of Hugh IV of Egisheim (whom I name Ludwig von Braunschweig, Count of Derlingau & Gertrude von Egisheim).