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MUNICH, GERMANY - JUNE 30: Princess Birgitta of Sweden and her husband Prince Johann Georg of Hohenzollern present their baby boy Hubertus, a few weeks old, in an official picture with their daughter Desiree (left) and their eldest son Carl Christian (right) on June 30, 1966 in Munich, Germany. (Photo by Gamma-Keystone via Getty Images)

MUNICH, GERMANY - JUNE 30: Princess Birgitta of Sweden and her husband Prince Johann Georg of Hohenzollern present their baby boy Hubertus, a few weeks old, in an official picture with their daughter Desiree (left) and their eldest son Carl Christian (right) on June 30, 1966 in Munich, Germany. (Photo by Gamma-Keystone via Getty Images)