Well at the time i had no idea what i was going to name my self on the forums , so i just thought in my self from ocarina of time, Ocarina (that link playes) and then sword (hmm link uses the sword a lot) so OcarinaSword.
Demon Link. Have you ever played Majora's Mask and gotten the Fierce Deity Mask? I read somewhere that the Japan version of MM said something along the lines of, "Demon Link" or, "Demon Mask" Because demons are good (i guess) in Japan. So I did not know how to spell Fierce or Deity (I can now, obviously)so I took on the name Demon Link. This is only my Zelda profile name. My other one for everything else is Loki0790.
I got Elvenknight while brain-storming Zelda-related ideas when signing up here. Noramlly I go by HyrulianBlackcat. Elvenknight means I am an elf who's a knight. HyrulianBlackcat means I'm a black cat from Hyrule.
So... my real name is Amanda, and Mandy is also a form of that--though I'm never called Mandy... Well, anyways... when I created my first email with Google Mail, I registered and couldn't think of what to call my email username, so I just waited for some of their default suggestions and, well... 'mandym287' was one of them. xD Just used it here as well as a few other places.