Kerstin Köppen
Kerstin Köppen (later Köppen-Kosbab now Holtmeyer, born 24 November 1967 in Rathenow, Bezirk Potsdam) is a former German rower and Olympic champion. She is a two-time Olympic gold medallist, winning in 1992 and 1996. In addition, she has also won 5 Gold Medals in the Quadruple Sculls event at the World Championships beginning with Lake Barrington, Tasmania in 1990 whilst representing the former East Germany and a further four times for the re-unified Germany. She is married to Ralf Holtmeyer who coaches the German eight.