I use Vohn Exel everywhere. I came up with it when I was like 10 or so for a video game. I know I used it for Shadows of the Empire but I can't remember when I came up with it earlier then that, though I'm pretty sure I did. I'm using the name for a book I'm writing as well.
about a year ago I found out there was a basketball player named Nick Van Exel,(I am not a sports fan) and I've always wondered if I heard the name when I was ten and didn't register it and it just sounded good later on, lol.
Pretty much, I was trying for a Star Wars sounding name. Vohn sounded different, and then Exel sounded like you would "excel" at things, and that sounded like a Star wars last name...so I went with that, lol.