 He would later point out the occurrence of the name Maria in the next generation of the Kievan dynasty, and suggested that Agatha could instead have been sister of the Byzantine wife of Vsevolod I of Kiev, that the tradition of imperial connections had confused which Empire was involved.However, he subsequently studied the sources and particularly the chronology of this dynasty in more detail and concluded that this solution was unlikely, though he did favor a reconstruction making Yaroslav the son, rather than the step-son, of the Byzantine princess Anna Porphyrogeneta.One inference from the Kievan theory is that Edgar Ætheling and St. Margaret were, through their mother, first cousins of Philip I of France.