Who is the oldest of Odessa Grady Clay's two sons?
Rahman Ali 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.
Robert Todd Lincoln Robert Todd Lincoln (August 1, 1843 – July 26, 1926) was an American politician, lawyer, and businessman. He was the first son of President Abraham Lincoln and Mary Todd Lincoln. Born in Springfield, Illinois, he was the only one of Lincoln's four sons to live an adult life (his brother Tad Lincoln died shortly after his 18th birthday), and the only member of the family to survive into the 20th century.