Original xbox generated username was "VirtualRogue10" CRINGE
Anyways over the years "Virt" kinda stuck with me and I made variations upon it, most of which have aged significantly and make me cringe as I'm typing them.
One day I just happened to across this name, if I wanted to be philisophical I'd say it comes from the Roman Author "Virtruvius", in reality I just got it from the Lego Movie and tweaked the spelling and here we are today.