Her Royal Highness Princess Bismai Bimalasataya or Phra Chao Boromwongse Phra Ong Chao Bismai Bimalasataya was the Princess of Siam later Thailand. She was a member of Siamese Royal Family. She was a daughter of Chulalongkorn, King Rama V of Siam and Chao Chom Manda Ruen.
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Source: Wikipedia