Erwin Keller
Erwin Keller was a field hockey player from Germany, who won the silver medal for his native country at the 1936 Summer Olympics in Berlin.
Four members of his family did even better and won Gold.
His son Carsten Keller captured the gold medal at the 1972 Summer Olympics as did three of his children, all as strikers.
Andreas became Olympic champion in 1992, after winning silver at the two previous Olympics in Los Angeles and Seoul.
Natascha competed in three Olympics, winning gold at the 2004 Summer Olympics in Athens.
At the 2008 Summer Olympics Florian also won the gold medal for Germany.
