William Braunstein, better known as Ill Bill, is a American rapper and record producer from Brooklyn, New York. Having gained notoriety in the underground hip hop group Non Phixion, Ill Bill is known for his hardcore/sexual/violent diverse lyrics and as the producer, founder and CEO of Uncle Howie Records. His brother Ron is also a rapper and producer, known as Necro.
- Born: July 14, 1972 (age 46), Brooklyn
- Aliases: Billy Crystale, Ill Bil, William Braunstein, William Cutting
- Genre: Hip hop music