Hmm.. Originally, mine was "koimayeul".
Derived from the sound of a French social site, early Facebook of the 2000's called "Quoi Ma Gueule", litteraly "What My Mouth" (Face).
This is also a song from a famous French artist, Johnny Halliday but it was none of my reasons to create it.
With time, I got enough of the link with the song, and the "in your face" of my nickname.. I changed it to "kwamayeul". Maybe related to the Kwama creatures in Morrowind, but just a letters switching as far as I wanted.
Finally, it is also koima57 or kwama57, my state location in France having that department number.
Other nicknames I like to use.. Etherial, Govinda, Magicaldreamer, Grouny, Alcahest.. :)