you can just lie about your name to people and that's what they think your name is. like you can just name yourself whatever you want
When I started college I met a freshman named Fish. Everyone on campus called him Fish. His family came to visit him in the spring semester and we were like "Hey! Fish's family!" and they said "Who's family?"
This dude went to college and just decided. For whatever reason. That what he really wanted to be known as. Was. Fish. So when it came time to introduce himself, he said, "Hey, I'm Fish," and everyone on campus just said "Hi Fish" and were secretly glad he wasn't another Michael or Matthew. Why Fish, I do not know. His family had no clue why either.
I also knew a guy whose nickname was Goat. College is just like that sometimes.