Answer:
Richard III Had two brothers . The eldest became Edward IV and the younger was George Duke of Clarence he also had a sister named Elizabeth.
Actually he had three brothers. Edward was the eldest, then Edmund, Earl of Rutland who was killed in 1460 along with their father, Richard, Duke of York. Then George and Richard was the youngest. He also had two sisters. Margaret who married Charles the Bold who was the Duke of Burgundy and Elizabeth who married John De La Pole. After Richard's young son died in 1484, he named his nephew, John De La Pole as his heir.