Meaning

originFrom German Nixe, feminine of Nix, from Middle High German nickes, from Old High German nihhus (“water-elf, crocodile”), from Proto-Germanic *nikwus, *nikwis, perhaps from Proto-Indo-European *neygʷ- (“to wash”). Cognate with Old English nicor (“water-elf, hippopotamus, walrus”), English nicker.

Etymology from Wiktionary, CC BY-SA 3.0