Io's father is generally given as Inachus, a river god credited with inaugurating the worship of Hera in the countryside around Argos, thus establishing her as an autochthonous spirit of the Argolid and thus by her nature the nymph of a spring, a Naiad. However, due to the Inachid genealogy being generally confused, other versions concerning her parentage existed as well. In some accounts, she ms the daughter of the Argive Iasus, who himself was given either as the son of Argus Panoptes and Ismene, the daughter of Asopus, or of Triopas and Sosis; Io's mother in the latter case was Leucane. Io's father was called Peiren in the Catalogue of Women, and this figure might be a son of the elder Argus also called Peiras, Peiranthus or Peirasus in other sources. Io may therefore be identical to Ca