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.