Saat X (born Derek Murphy) is an American rapper, most famed as a member of Alternative hip hop group Brand Nubian. Originally known as Derek X, Sadat takes his name from former Egyptian president Anwar Sadat. The X is taken from the Nation of Islam practice of members changing their surnames simply to X. He is well known for his unique, high-pitched voice, as well as his Pro-Black, and at times controversial, lyrical content.