These are ideas I have used:
Use your name: first, middle, and / or last. Spell them back words. Spell them how they are pronounced backwards. Add hyphens and apostrophes. Remember you only have 15 spaces to make up a name, so you may have to mess around a little. Use friends' and family members' names.
Scramble up these names and rearrange them so they look and sound alien-esque. Add hyphens and apostrophes. I know you prefer humans while I, on the other hand, prefer aliens. Sorry. The two above suggestions are techniques I have used in writing stories. I have integrated friends and family members' names into them.
Finally try "Plays on Words." This was what I did on all of my alts: Your name conveys a message to anyone to reads it and can recognize it's meaning. It can convey a threat or a peaceful gesture. The last few letters can be your Surname (family / Legacy). Try to develop similar messages into plays on words, while keeping in mind, the last name you reserved as your legacy name.