Giacomo Perez-Dortona or d'Ortona (born 11 November 1989) is a retired French competitive swimmer belonging to club CN Marseille. At the 2012 Summer Olympics, he competed in the men's 100 metre breaststroke, finishing in 17th place in the heats, failing to reach the semifinals. He was also part of the French men's 4 x 100 m medley relay team.
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