Achelois

Achelois ("she who washes away pain") is a minor goddess in Greek mythology; one of the moon goddesses. She was frequently the recipient of sacrifices ordered by the Dodonian Oracle, in order for her subjects to be cured of their ailments.Achelois was a surname of the Sirens, the daughters of Achelous and a muse.Achelois was a general name for water-nymphs, as in Columella, where the companions of the Pegasids are called Acheloides.
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[Greek] A moon-goddess (she who drives away pain) to whom sacrifice was ordered by the Dodonian Oracle.