[FAMILY.FTW]
ACHELOIDES (1) were water nymphs, daughters of Achelous, who were sometimes the companions of the Pegasides (Muses). They belonged to a larger class of river nymphs, the Potameides, local divinities named after their rivers. [Columella, On Country Matters 10.263.]
ACHELOIDES (2) was a surname of the Sirens, the daughters of Achelous and Sterope, daughter of Porthaon. [Ovid, Metamorphoses 5.552, 1487; Apollodorus 1.7.10.]