Marvin O'Neal, professionally known by his stage name Marv Won, is an American rapper and record producer from east side Detroit, Michigan. He is a member of underground hip hop group the Fat Killahz (with Fatt Father, Bang Belushi and King Gordy) and rap duo Twin Towers (with Fatt Father). In 2021, he received a Detroit Music Award nomination for Outstanding Rap MC at the 30th Detroit Music Awards.