The two children of Cassius Marcellus Clay Sr. and Odessa Grady Clay was a three-time World Heavyweight Champion and who?
Cassius Marcellus Clay Sr.:  He married Odessa Lee O'Grady in the 1930s and worked as a painter and a musician. Odessa Grady Clay: Odessa Lee Clay (née O'Grady; February 12, 1917 – August 20, 1994) was the mother of three-time World Heavyweight Champion Muhammad Ali and Rahman Ali, and the grandmother of Laila Ali.
Rahman Ali