Erasinos was one of the Potamoi. He was the god of a river in Arkadia and Argos in Peloponnesos which was part of southern Greece. Erasinos' stream near Lake Stymphalos in Arkadia near where the Lernain Hydra did dwell. The Erasinos emptied into the Argolic Gulf near Lerna. The only river (and its god) of significance that was near Erasinos was Inakhos which the Erasinos was a tributary of Inakhos.
Okeanos & Tethys