Gretel Beer (born Margaret Weidenfeld; 1921 – 2010) was an Austrian-born English author of cooking books and travel reports. She also served as a cookery writer for The Daily Telegraph and Daily Express newspapers.
Gretel Bergmann (1914-2017) was a German track and field athlete. The Nazis banned her from competing in the 1936 Summer Olympics because she was Jewish. She later emigrated to the United States to escape anti-Semitism in Germany.
The youngest of the von Trapp children in Sound of Music was called this, not sure how it was spelled there though.
― Anonymous User 12/14/2005
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Gretl (note spelling variation) was used as the name of the youngest von Trapp daughter in the movie "The Sound of Music". Gretl's character represented the real youngest daughter, who was named Martina.