This has probably been asked before but I wanted to add another layer/an alternative.
So, I ask, where did your username/pseudonym/nickname originate from? What’s the meaning behind it?
Or alternatively, which is the most creative/interesting nickname origin you have come across?
I once created a character in a story when I was a child about a Jack Green from the planet Æarth, and named an account on a popular site accordingly as a similarly young person, as I lacked nominative creativity, evidently. People kept getting confused between Æarth and Earth so I just changed it to Earth for future accounts.