Green's actual name is Dennis Regan. Green DaYoshi was just a nickname given to him by some of his friends because of his (former) resemblence to lead singer of Green Day, Billie Joe Armstrong, however, his looks have changed over the past few years and now he just goes by Green. He grew up in a small town in Ohio with a normal childhood in a middle-class community. There's not much interesting history behind him, so I won't bore you with little detials.