Question: Who is the oldest of Odessa Grady Clay's two sons?
Related documents: [0]  [DOC] 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. She married Cassius Marcellus Clay, Sr. in the 1930s and worked for some time as a household domestic to help support her young children. [END] 
[1]  [DOC] Rahman Ali (born Rudolph Valentino Clay ; July 18, 1943) is an American former heavyweight boxer. He is the younger brother of the late Muhammad Ali. [END] 
Answer: 
Muhammad Ali
Muhammad Ali