Various strands of the Kayanian legends were brought together by the Arsacid period (if not, indeed, earlier), when Iranian cultural and religious influence in Armenia was strongest, and the name Hrazdan, a NW MIr form, was given to the tributary of the Araxes, which flows through the modern Armenian capital, Erevan. The name is first attested as getn Hurazdan ´the river Hurazdan´ in the History of Sebeos., while Movses Xorenaci uses the apparently older form Hrazdan.