Jonathan Burks (born October 4, 1964), better known by his stage name Jaz-O, is an American rapper and record producer active in the late 1980s through the 1990s, best known for being the mentor of Jay Z. Jaz is also known as the Originator and had a song called "The Originators" that featured a young Jay Z in 1990. As The Jaz, he had success with his 1989 single "Hawaiian Sophie" from his debut album Word to the Jaz. He has been featured on some of Jay Z's songs, such as "Bring it On" (from Reasonable Doubt), "Ain't No Nigga", and the single "Nigga What, Nigga Who (Originator 99)" from Vol. 2: Hard Knock Life, where he was credited as Big Jaz. He also produced the single "Ain't No Nigga" from Reasonable Doubt and the song "Rap Game/Crack Game" from In My Lifetime, Vol. 1. The album "Kingz Kounty (2002) - with The Immobilarie Present" marked the last time Jay Z and mentor Jaz-O would ever collaborate.