Swimmer Tricia Duncan is the older sister of Tim Duncan, who professionally played what sport for 19 years
Tim Duncan Timothy Theodore Duncan (born April 25, 1976) is an American retired professional basketball player who played his entire 19-year career with the San Antonio Spurs of the National Basketball Association (NBA). Widely considered to be the greatest power forward of all time, he is a five-time NBA champion, two-time NBA MVP, three-time NBA Finals MVP, NBA All-Star Game MVP and NBA Rookie of the Year. He is also a 15-time NBA All-Star and the only player to be selected to both the All-NBA and All-Defensive Teams in all of his first 13 seasons.
Duncan White Major Deshamanya Duncan White, MBE, ED (Sinhala: ඩන්කන් වයිට්) (1 March 1918 – 3 July 1998) was a Ceylonese (Sri Lankan) sportsman. He was the first Ceylonese athlete to win an Olympic medal, winning silver in the 400-metre hurdles at the 1948 Summer Olympics in London, England. He was also the only South Asian to have won an Olympic medal in track and field for more than fifty years, until Susanthika Jayasinghe won a silver medal in the 200 metres in 2000.