"I had a pretty tight knit group in one of my high school classes. In one of our conversations, it was brought up how horrible I was at the time with remembering names. One of the guys, who happened to be Hispanic, said to me "Bro, I know you know my name. Come on man, what's my name?" I honestly didn't know and so I popped out the first name that came to mind. "I don't know dude, Carlos?"
Everyone, including Carlos started laughing. For some reason, it just stuck. No one called him by his first name, even the teachers. From that point onward, he was Carlos.
To satisfy the curious, his name was Andrew."