Margot Betti Frank (February 16, 1926 - late Feburary or early March, 1945) was the elder sister of Anne Frank, whose deportation order from the Gestapo hastened the Frank family into hiding, and who subsequently perished in Bergen-Belsen. Wikipedia
The definitive Wikipedia entry for Margot Frank. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Margot_Frank