In Greek mythology, Cerdo (Ancient Greek: Κερδοῦς means 'gain, profit' or 'the wily one' or 'weasel, vixen'[1]) was the nymph-wife of King Phoroneus of Argos and mother of Apis and Niobe.[2] Otherwise, the consort of Phoroneus was called either Cinna,[3] or Teledice (or Laodice) also a nymph,[4][5] or Perimede,[6] or Peitho and Europe.[7]
According to Graves, Cerdo (‘gain or ‘art’) is one of Demeter's titles; it was applied to her as weasel, or vixen, for both are considered prophetic animals.[8]