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.
Dominique Duncan Dominique Lynn Duncan (born May 7, 1990) is an American–born Nigerian sprinter who is eligible to compete for Nigeria after switching allegiance from the United States of America. Dominique is a national and African record holder after she won gold alongside Blessing Okagbare, Regina George and Christy Udoh in the Women's 4 × 200 metres relay event at the 2015 IAAF World Relays in Nassau, Bahamas.