Ronystony Cordeiro da Silva (born 19 June 1980) is a Brazilian paralympic swimmer. He competed at the 2011 and 2015 Parapan American Games, winning one gold medal, four silver medals and three bronze medals in the breaststroke, freestyle and medley events. Cordeiro also won a gold medal at the 2013 World Championships in the men's 4 × 50 metre freestyle relay event. He also competed at the 2012, 2016 and 2020 Summer Paralympics.
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