Potameides
In Greek mythology, potameides (Ancient Greek: ποταμηίδες) is a name for nymphs of rivers. It is used by Apollonius of Rhodes, who writes that, when Jason summoned the goddess Hecate:
All the watery meadows shook at her footstep, and the marsh-dwelling river nymphs [ποταμηίδες] wailed, those who dance around that marshy meadow of Amarantian Phasis.
A scholium on the Iliad (from the A family of scholia) states that epipotamídes (ἐπιποταμίδες) is the name given to nymphs of rivers.