Hoppus derives from "Hoppy" which is my orignial nickname from a kid back in the day yelling "Look at me I'm *first name* "Hoppy" *last name* hopping in my underwear!!", which I changed up to Hoppus Maximus some years later for whatever reason. Then someone at school said I look like a Caveman, so that was my nickname for a while. Then after a little while I just combined Hoppus Maximus and Caveman and came out with HoppusTheCaveman. I use it for most things online, so that's why it's this. It would've been DaddyMoob but I thought people would've thought I was really weird and not talk to me or anything hahaha.
there's a lot more to it, but I don't feel like typing it out, and I doubt you would want to read all of it lol.