Hello there.
Over the years I used many nicknames, most of them in minecraft exclusively. In the following post I will focus on the four major one. On osu I just used one name tho.
It all started with my YouTube Account I guess. I registered at YouTube around seven years ago with the username FriendzoneLp, not yet knowing the meaning of "Friendzone", but I thought it sounded kinda cool so I took this name. LP of course, as many in that era, because of me wanting to make some Lets Plays and I wanted to upload them on YouTube.
My second name, N00bieLP (only Minecraft): I took that name when I was creating a Mojangaccount. I was using that name because I just started out with playing (online) games and I took that name ironically. I was about 11 to 12 years old back then.
My third name, the name I use for the most time and the name I am currently using on osu, Battle net and many others is Aextra. One day my Dad and I were driving back home to the place where my mother and I lived and I wanted to use the time (it was an around two and half an hour ride) to think about a name I could take. I still had some YouTube stuff in mind and I thought of some introduction. I came up with the german phrase "Extremes Hallo" something something what kind of translates into "Extreme hello" or something like that. I then thought of that by itself as kind of boring and then I just took the beggining letter of my real name and put it in front of "Extra": Aextra was born. I then proceeded to use that name for basically everything. So basically this name was made up with this weird phrase / word play in mind.. xD unironically. I was around 11 to 13 years old back then.
My fourth and last name I'm focusing on right now is the name "Ultimate Wassakocho".
I currently am using this name on my Twitch account and my YouTube channel. It comes from my former chemistry teacher who pronounced the word "Wasserkocher", translates to water boiler/kettle/water heater. She was from either a north-west part from germany or north-eastern part, I cant recall it correctly. Anyways.. I really liked that pronounciation and I made it my name. This one was meant to be taken ironically I guess. I was around 13 to 14 years old back then.
That was a good summary of my name history, I hope I didnt spam here too much.