Cláudio Kestener
Cláudio Mamede Kestener (born December 20, 1961 in São Paulo) is a former international butterfly swimmer from Brazil, who participated in a Summer Olympics for his native country. He is the son of Rolf Kestener, who participated in the 1948 Summer Olympics, in London. At the 1980 Summer Olympics, in Moscow, he finished 8th in the 4×100-metre medley final, breaking the South American record. He also swam the 100m and 200m butterfly, not reaching the finals. In 1981 he was the Brazilian record holder of the 100-metre butterfly, with a time of 57.12 seconds