Piras was the son of Argus and Evadne, daughter of river god Strymon while his brothers were, Ecbasus, Tiryns, Epidaurus, Criasus and according to some, Phorbas also.
[3] According to Hesiod and Acusilaus, Peiren was Io's father[4][5] while Eusebius mentioned Callithyia as the daughter of Peiranthus.
[7] Peiras was credited with the founding of the first temple of Hera in Argolis and appointed his own daughter Callithyia as the priestess.
Of the statues of Hera, which Pausanias saw in the Heraeum near Mycenae, the most ancient was one made of the wild pear-tree from the wood about Tiryns, which Peirasus was said to have dedicated for the sanctuary.
[8] The account of Pausanias and the mythographers, however, does not represent Peirasus as the artist of this image, as some modern writers suppose, but as the king who dedicated it.