Cool thread. So I might as well "chip in":
I had became a total metalhead in my early teen years. I had also gotten a copy of Scream Tracker III, Cubic Player and bunch of mods a friend, who had downloaded them from local BBSes, and I started playing around with these occasionally (didn't probably have much of clue what I was doing, but it was still pretty fun).
A bit later we discovered with another friend that there was a thing called "tracked metalscene" in dark depth of the interwebs, which instantly caught out attention. We wanted to start our own metal tracker group and naturally the one of the first questions was: "what artist handles should we use?".
I released couple of (crummy) tunes under the nick "Gargoyle", but then somehow discovered there was already another tracker using that nick (from probably a website like TraxInSpace or something), so I ended up changing my nick to "Warlord".
Biggest influence for the nick probably came from too many hours of playing "Warlords II Deluxe" (it says "Greetings Warlord!" when you start a game), but in the mind of a teenage kid, the nick seemed also "badass" enough for the tracked metalscene thing and, and also LAN/online gaming. I had managed to also purchase my first own modem at this point.
See below link for the Warlords II Deluxe reference:
In hindsight, I could have made _a little bit_ more original pick (there's e.g. quite a few bands using the same name) and have thought several during the years, that should I change it something else, but the thought-process usually ends with "nah".
In unrelated story, the other guy quit the tracking scene after couple of years, but I kept the tracking group going for several additional years and it eventually became one of the longest standing group in that small/obscure sub-scene, until the whole thing gradually faded away. :P
Btw. "Funnily" enough, I started my computing career with C64, moved to Amiga 500 and only after Commodore as a company had gotten bust, wanted to get my first PC (this was at turn of 486/Pentium era). Amiga is the origin of trackers, and growing up I admired the cool musics of Amiga games, but didn't really know yet that trackers were even a thing.