William Alton "Billy" Carter (March 29, 1937 - September 25, 1988) was the younger brother of United States President Jimmy Carter, born in Plains, Georgia. For a time, Carter attended Emory University in Atlanta but did not complete a degree. Carter served four years in the United States Marine Corps then returned to Plains to work for his older brother in the family business of growing peanuts. In 1955, he married Sybil Spires, a young lady from Plains. Wikipedia
The definitive Wikipedia entry for Billy Carter. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Billy_Carter
Billy Carter was neither the first nor the last brother to embarrass a president, but he was surely the most colorful. www.pbs.org/wgbh/amex/carter/peopleevents/p_bcarter.html