Undine

n. female water spirit

Undine, Undines, Undina or Ondine are sometimes interchangeable and may refer to:Ondine (mythology), a water nymph from German mythologyUndine (novella) (1811), a novella by Friedrich de la Motte FouquéOndine (actor) aka Robert Olivo (1937–1989), American actorOndine (ballet), a ballet by Jules Perrot and Cesare Pugni (1843), also known as The Naiad and the FishermanUndine (Waterhouse painting) an 1872 by John William Waterhouse.92 Undina, an asteroidUndines, the name for female gondola pilots in the manga ARIAUSS Undine, two ships in the United States NavyMV Undine, a ro-ro ferry (11854t, 1991) owned by Cobefret Ferries of BelgiumUndine (Schreiner), an autobiographical book by Olive Schreiner (1928)Ondine, a play by Jean Giraudoux (1939)Ondine (record label), a classical record label
See more at Wikipedia.org...

Noun
1. any of various water spirits
(hypernym) water sprite, water nymph

(n.)
One of a class of fabled female water spirits who might receive a human soul by intermarrying with a mortal.
  

[Folklore] In Teutonic folklore, undines are female water-spirits who like to associate with humans. They often join villagers in their dances and merry-making. An undine was created without a soul, but by marrying a mortal and bearing him a child she obtained a soul and with it all the pains and penalties of the human race.