Jonathan Burks 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, "Ain't No Nigga", and the single "Nigga What, Nigga Who" 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 - with The Immobilarie Present" marked the last time Jay-Z and mentor Jaz-O would ever collaborate.
- Born: October 4, 1964 (age 54), Brooklyn
- Aliases: Big Jaz, Jaz, The, JazO, Jonathan Burks, The Jaz, The Originator
- Genre: Hip hop music