Nasir bin Olu Dara Jones, known mononymously as Nas, is an American rapper, entrepreneur, and record producer. Rooted in East Coast hip-hop, he is regarded as one of the greatest rappers of all time. The son of jazz musician Olu Dara, Nas began his musical career in 1989 under the moniker "Nasty Nas", and recorded demos under the wing of fellow East Coast rapper Large Professor. Nas made his recording debut on Professor's group, Main Source's 1991 song "Live at the Barbeque".