What is another word for "kelpie"?

Roget's Thesaurus (1911) lists these synonyms for "kelpie": air, and, bad, banshee, cloud-compeller, demiurge, deva, dryad, fairy, familiar, fay, folklore, genius, god, goddess, good, hamadryad, heathen, mermaid, moonshine, mythology, naiad, nereid, night, nixie, nymph, oread, pantheon, peri, pixy, sibyl, spirit, sprite, sylph, sylphid, the, tutelary, water, wood, you.