I have been using Xepol as an alias since the early BBS days back in the 80ies.  Everyone was asks what a 'Xepol' is gets the same answer : "Lopex, backwards'.  Very few people are satisfied with that answer.

Xepol has been a great online name to bring forward to the internet.  The X name space is very uncrowded and I have only once run into someone else trying to claim it for their own. (Accept no substitutes, I'm the real deal and have been for a LONG, LONG time.)

Google searches have, however revealed to me a few other Xepols that you might find interesting:

a Place: Xepol, Guatemala
a Polio Drug:  Xepol (Human Immunoglobulin)

Of course, the same google search reveals me in many of my phases:  programmer, insightful, netzien, and the ever unpopular grumpy as hell expresses his mind freely, and even the occasional foot in mouth sufferer.

So there you go, now you know what a 'Xepol' is.