About Princess Joséphine-Charlotte of Belgium
Princess Joséphine-Charlotte of Belgium was Grand Duchess of Luxembourg as the wife of Grand Duke Jean. She was the first child of King Leopold III of Belgium, and sister of the late King Baudouin and former King Albert II and aunt of King Philippe. She was also the maternal first cousin of King Harald V of Norway, maternal second cousin of former Queen Margrethe II of Denmark, and a paternal third cousin of the late Queen Elizabeth II of the United Kingdom. Joséphine-Charlotte first attended school at the Royal Palace in Brussels, where a small class had been organized for her. Later, in 1941, her father remarried to Mary Lilian Baels (later became Princess of Réthy).
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.