What are some good mermaid names for a story?

something ive always used when i get stuck with names is this: pick a few english words you like. like, tail or water or waves. then go to a translator website (a free one of course) and input one of the words at a time, going from language to language till you get a word that sound pretty and would make a good name! then its unique and exotic! and if you need a meaning just look up the meaning for the english version and there you go!