From the Greek name Ανδρεας, meaning "manly".
Also, a very sweet, kind, funny, and handsome guy who likes weirdly awesome technometal stuff and 80s' bands. This guy will make you fall for him instantly and never want to let him go, so watch out. He's also very tall and gives awesome spin-hugs. Andrew is a very cool person to spend time with. Everybody wants to marry an Andrew.
Girl 1: "OMG, IS THAT TALL GUY ANDREW?"
Girl 2: "Yeah, don't you just want to be with him forever?"