Princess Marie Amelie of Baden
Princess Marie Amelie of Baden was the youngest daughter of Charles, Grand Duke of Baden and Stéphanie de Beauharnais. In 1843, she married the Scottish nobleman William Hamilton, Marquess of Douglas and Clydesdale. They became the Duke and Duchess of Hamilton upon the death of William's father in 1852. Their only daughter Mary married the future Albert I, Prince of Monaco and was the mother of Louis II.
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Princess Marie Amelie of Baden (Marie Amelie Elisabeth Caroline; 11 October 1817 – 17 October 1888) was the youngest daughter of Charles, Grand Duke of Baden and Stéphanie de Beauharnais. In 1843, she married the Scottish nobleman William Hamilton, Marquess of Douglas and Clydesdale. They became the Duke and Duchess of Hamilton upon the death of William's father in 1852. Their only daughter Mary married the future Albert I, Prince of Monaco and was the mother of Louis II.

Princess Marie Amelie was a cousin of Napoleon III of France, as well as a friend of his and his wife's, Empress Eugénie. She often accompanied the couple at official events, and provided them lodging when they visited her outside France.