There is also a case for Yaroslav's descent from Anna. According to this theory, Nestor the Chronicler deliberately represented Yaroslav as Rogneda's son, because he systematically removed all information concerning Kievan ties with Byzantium, spawning pro-Varangian bias (see Normanist theory for details). Proponents allege that Yaroslav's true age was falsified by Nestor, who attempted to represent him as 10 years older than he actually had been, in order to justify Yaroslav's seizure of the throne at the expense of his older brothers.