When I was in high school, I was super nervous and didn't introduce myself a lot. So when I went to the tech campus for extracurricular stuff, I didn't at all. A girl asked for my help but didn't know my name, and went with 'Paul', thinking it was my name.
It is not. I did not correct her. And so, I was now Paul, and remained so to everyone in that tech campus until the year ended.
Used it instead of my real name on the internet because the internet scared me when I first started out, but now I really don't care. Didn't really commit anyway; Devers is my real last name anyway!