Ulf Merbold and Lodewijk van den Berg, both flew in ?
Ulf Merbold Dr. Ulf Dietrich Merbold (born June 20, 1941) is the first West German citizen and second German native (after Sigmund Jähn) to have flown in space. He is also the first member of the European Space Agency Astronaut Corps to participate in a spaceflight mission and the first non-US citizen to reach orbit in a US spacecraft. In 1983, he and Byron Lichtenberg became the first Payload Specialists to fly on the shuttle.
Freek van de Graaff Frederik Robbert "Freek" van de Graaff (20 February 1944 – 24 June 2009) was a Dutch rower who won a bronze medal in the coxed fours at the 1964 Summer Olympics. His team mates were Marius Klumperbeek (cox), Lex Mullink, Bobbie van de Graaf and Jan van de Graaff. The three "van de Graaf(f)s" were all born in 1944.