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16. Sophie Caldwell
Cross country skier Sophie Caldwell will be competing in the Olympics for her second time this year in PyeongChang. Her grandfather, John Caldwell, competed in Nordic combined and cross-country skiing at the Olympic Winter Games back in 1952, and was even inducted into the US Ski Hall of Fame in the '80s. Her uncle, Tim Caldwell, was a four-time Olympian in cross-country skiing, and her mother was a former national ski racer. Talk about incredible genes!