I remember visiting this website once...
It was called Mermaid/Merman name generator
Here's some stuff I remembered seeing:
This mermaid and merman name generator will generate either 10 male or female names depending on your choice. These names are pretty much all related to water in one way or another, sometimes through different languages, sometimes merely by changing a word like \'aqua\'.
There are far more mermaid names than merman names, but that\'s only logical when some fantasy universes don\'t even have mermen.
To start, simply click on the button to generate 10 random names. Don\'t like the names? Simply click again to get 10 new random names.
The art above has kindly been submitted by Cheru, click to visit his DeviantArt profile.
You\'re free to use all the names and descriptions in any of your works.
All background images part of the generators are part of the public domain and thus free to be used by anybody,
with the exception of user submitted backgrounds, game images and the pet name generator images.
All other original content is part of FantasyNameGenerators.com and cannot be copied, sold or redistributed without permission.