A. Sweden
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Source: reuters
A moment to remember - Siblings Princess Madeleine, Prince Carl Philip and Crown Princess Victoria with fiancé Daniel sharing a laugh as they arrive for the Swedish Government's dinner on the eve of Victoria and Daniel's wedding, June 18, 2010.
B.) Monaco
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Source: Gettyimages.com
The Casiraghi Trio and their nestling - Siblings Andrea, Pierre and Charlotte Casiraghi with their youngest sister Princess Alexandra pictured in Monaco in November 2009.
C.) Dubai
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Source: Newscom
March 26, 2011 - Sheikh Hamdan gives a flower to his sister Sheikha Al-Jalila during the Dubai World Cup. Jalila is the daughter of Sheikh Muhammad and Princess Haya.
D.) Jordan
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Source: Laha Magazine
September 2006 - Princess Salma plays with her brother Prince Hashem.
E.) Morocco
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Source: MAP
May 2011 - Crown Prince Moulay Hassan and his sister Lalla Khadija pose for a picture released to mark the former's 8th birthday.
F.) Belgium
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Source: Corbis
Princess Elisabeth, Prince Gabriël, Prince Emmanuel and Princess Eleonore picture at the royal garden.
G.) Spain
Picture Link
Source: Daylife
Crown Prince Felipe and Princess Letizia's daughters Leonor and Sofia are photographed for the couple's Christmas card 2010.
H.) Norway
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Source: Det kongelige hoffs fotoarkiv
The picture shows Princess Ragnhild of Norway and her younger sister Princess Astrid in 1932.
I. ) The Netherlands
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Source: Quezi.com
Canada, December 1944: Princess Margriet, Princess Irene and Princess Beatrix in Canada during the Second World War.