In Greek mythology, Procris was an Athenian princess, the third daughter of Erechtheus, king of Athens and his wife, Praxithea. Homer mentions her in the Odyssey as one of the many dead spirits Odysseus saw in the Underworld. Sophocles wrote a tragedy called Procris that has been lost, as has a version contained in the Greek Cycle, but at least six different accounts of her story still exist.

Erechtheus in Greek mythology was a king of Athens, the founder of the polis and, in his role as god, attached to Poseidon, as "Poseidon Erechtheus". The name Erichthonius is carried by a son of Erechtheus, but Plutarch conflated the two names in the myth of the begetting of Erechtheus.