In Greek mythology, the Nereids (/ˈnɪəriɪdz/ NEER-ee-idz; Greek: Νηρηΐδες, sg. Νηρηΐς) are sea nymphs (female spirits of sea waters), the fifty daughters of Nereus and Doris, sisters to Nerites. They were distinct from the Sirens. They often accompany Poseidon, the god of the sea, and can be friendly and helpful to sailors fighting perilous storms.
Elen is an ancient goddess of sovereignty of the land. Often refereed to as Elen of the Ways and would lead the tribe and the herds of reindeer during their winter and summer migrations across Britain and possibly to Scandinavia after the last Ice Age. Is Elen one of the links between Proto-Celts and the Norse traditions? Elen does have a lot of correspondences with Freyja, who is in essence a shamanic nature and fertility goddess of the Norse.