The Nixie of the Mill-Pond
"The Nixie of the Mill-Pond" (German: Die Nixe im Teich) is a German fairy tale that tells the story of a man captured by a nix (water spirit) and his wife's efforts to save him. The Brothers Grimm collected the tale in their Grimm's Fairy Tales (1857) as tale number 181.
Source: Wikipedia — The Nixie of the Mill-Pond (CC BY-SA 4.0)