Cydonie Camille Mothersille (born 19 March 1978) is a female former track and field sprinter from the Cayman Islands. Her speciality at the beginning of her career was the 100 metres, while the 200 metres gradually became her main event. She represented her country at four Olympic Games from 1996 to 2008, six World Championships in Athletics, and three Commonwealth Games. Her greatest achievements were in the 200 m, including a bronze at the 2001 World Championships in Athletics, Commonwealth gold in 2010 and a silver at the 2003 Pan American Games. Her World Championship medal was the first ever for her nation.