I used google and found this site which has helped me some - but it doesn't seem to be a very extensive dictionary, and I couldn't find much in the way of other resources.
I'm sorry in advance if this is a lot. And I know that some of these words definitely won't have a direct translation but any suggestions that have a similar feeling would be much appreciated!
Here's a list:
Banshee. (I was thinking something like death singer?)
Goblin. (In our lore, they're prankster fairies.)
Leprechaun. (Basically fairy frat boys who love money and grant wishes.)
Pixie. (Essentially fairy godmothers.)
Vasily. (Fairy cowboys?)
Selkie. (They turn into alligators in our lore, since the bayou isn't very conducive to seals.)
Will O' Wisp.