Georgy Prokopenko
Georgy Yakovlevich Prokopenko is a retired Soviet swimmer who competed at the 1960 and 1964 Summer Olympics. In 1964 he won a silver medal in the 200 m breaststroke and finished fourth in the 100 m medley relay. He won three European titles in these events in 1962 and 1966, and set two world records in the 100 m breaststroke in 1964. Between 1962 and 1964 he also set eight European records in the 100 m medley relay and in the 100 m and 200 m breaststroke disciplines.
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Source: Wikipedia