How did they get the name b2k?

i know three boog, lil fizz, and Omarion

jarell houstondreux fredricomarion grandberryDeMario thorton

Usually Jim or Jimmy is short for James

Tunis

"your name is" is correct English and when used in this way means both your full name or a part of your name (usually surname, depending on the context). "your names are" is also correct English, but...