Back in 1996, before the internet really took off, I was invited to participate in some Internet Relay Chat rooms, ones set up for people local to the area I had just moved into.
So, I needed an online nick, max eight letters. I decided to adapt a nickname I was assigned at one point in my life, made it shorter and more unique.
I have kept the same username ever since and I am the only Dngrsone (as far as I know) on the internet.