Rolf Egon Kestener (August 8, 1930 – 1998 in São Paulo) is a former international freestyle swimmer from Brazil, who participated in a Summer Olympics for his native country.
His son, Cláudio Kestener, participated in the 1980 Summer Olympics, in Moscow.
At the 1948 Summer Olympics, in London, he finished 8th in the 4×200-metre freestyle final, along with Aram Boghossian, Willy Otto Jordan and Sérgio Rodrigues. He also swam the 1500-metre freestyle, not reaching the finals.
At the 1955 Pan American Games in Mexico City, he won the bronze medal in the Water Polo.
He broke two times the Brazilian record in the 1500-metre freestyle, both in London at the 1948 Summer Olympics.