Kevin Ketchum, better known as Supreme Allah, was an African American inmate and a character in the HBO TV series Oz. He was Ryan O'Reily's main antagonist in Part II of Season 4.

He was portrayed by Lord Jamar.

"Prisoner number 00K251, Kevin Ketchum AKA Supreme Allah. Convicted March 22, 2000 - Murder in the second degree. Sentence: 25 years, up for parole in 10." A Five Percenter, he is serving time for murdering a man who laughed at him during a dice game. He often preaches Five Percenter philosophy while simultaneously dealing drugs. It is revealed that Supreme is responsible for the incarceration of Augustus Hill, having revealed Hill's location to the police after they picked him up on an old arrest warrant. As a result, Burr Redding, Augustus' stepfather, hates Allah. Despite his numerous enemies, lack of real allies, and his controversial and occasionally contradictory beliefs, Supreme survives numerous murder attempts, though he is killed eventually. It is possible that Ketchum's character and religion are a reference to Kenneth "Supreme" McGriff, a Five Percenter who ran the New York City based Supreme Team drug organization.