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Belgium's Princess Mathilde, center, holds her newborn son
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Belgium's Princess Mathilde, center, holds her newborn son Gabriel Boudouin Charles Marie, left, and her daughter Princess Elisabeth, during a photo session at the Royal Palace in Brussels. Prince Gabriel, who is third in line to the throne, was born Aug. 20, 2003. (Aug. 22, 2003)(Credit: AP)

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Royal babies from around the world

Kate Middleton and Prince William's newborn son, the third in line for the British throne, is in great company. See photos of more royal babies from around the world.