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. The Primary Chronicle, for instance, states that Yaroslav died at the age of 76 in 1054 (thus putting his birth at 978), while dating Vladimir's encounter and marriage to Yaroslav's purported mother, Rogneda, to 980. Elsewhere, speaking about Yaroslav's rule in Novgorod (1016), Nestor says that Yaroslav was 28, thus putting his birth at 988. The forensic analysis of Yaroslav's skeleton seems to have confirmed these suspicions, estimating Yaroslav's birth at ca. 988-990, after both the Baptism of Kievan Rus and Vladimir's divorce of Rogneda. Consequently, it is assumed that Yaroslav was either Vladimir's natural son born after the latter's baptism or his son by Anna. Had Yaroslav an imperial Byzantine descent, he likely would not have stinted to advertise it. Some have seen the willingness of European kings to marry Yaroslav's daughters as an indication of this imperial descent. Subsequent Polish chroniclers and historians, in particular, were eager to view Yaroslav as Anna's son. Recent proponents invoke onomastic arguments, which have often proven decisive in the matters of medieval prosopography, but these may be worthless in this case specifically because of the great shift to Christian names just then experienced in the Rus royal dynasty, an upheaval more than enough to explain all unprecedented names if they are Christian. It is curious that Yaroslav named his elder son Vladimir (after his own father) and one of his daughters Anna (as if after his own mother). Also, there is a certain pattern in his sons having Slavic names (as Vladimir), and his daughters having Greek names only (as Anna). However, in the absence of better sources, Anna's maternity remains a pure speculation. Obscure offspring Vladimir had several children whose maternity cannot be established with certainty. These include two sons, Stanislav of Smolensk and Sudislav of Pskov, the latter outliving all of his siblings. There is also one daughter, named Predslava, who was captured by Bolesław I in Kiev and taken with him to Poland as a concubine. Another daughter, Premyslava, is attested in numerous (though rather late) Hungarian sources as the