mine has little to say, those who know mythology might understand. My quest for an 'internet' nickname became the first time I used IRC, long time ago. I've been always very fancy to mythology, I actually collected a whole encyclopedia of mythology when I was kid, along with a Larousse world history and Dinosaurs. In any way, I always identified myself with Apollo, sun and arts, also specific attributes of character in some way, and specially when I shared the first letter. It would be good for IRC.
I think my first nicknames were Apo or Apol...any other version of Apollo were taken.
Then I think it was a documentary that recalled me about the link of Apollo to earth, shared with Baco in some way, and I created a sort of mythology behind it, although the concept is actual mythology, Delfos being the link of gods to earth, not to mention one of the most known oracles. Since then I use Delfos, Delfos this, Delfos that. Delfos is the Portuguese version of "Delphos", in Greek it uses the same number of letters, although the phonetic termination is different from modern one.