When I was a much younger and more innocent gamer, I was trying to work on my handle as I came up with the name for my PSN account. I wanted something that didn't rely on x's, 420's, and 69's. I decided to pull from one of my favorite novels, The Once and Future King, and take a handle from one of the characters (Gaheris, or something along those lines), a brave and valiant knight. Turns out I picked the wrong character, mixed him up with his similarly named brother, and that due to the annoying text typing tool the PSN had, misspelled it anyway. I realized this only after I pressed accept. However, I figured that since no one else has a name like it, I decided to keep it from then onward.
And so, my name on every console, forum, etc. comes from a brief lapse of idiotic incompetency.