Saovabha was born as a Princess of Siam to King Mongkut (or Rama IV) and Princess Consort Piyamavadi (Piam Sucharitakul). She was the youngest sister of the future Queen Sunandha Kumariratana and Queen Savang Vadhana.
Princess Saovabha, born into royalty in Siam to King Mongkut and Princess Piyamavadi, was the youngest sibling of future queens Sunandha Kumariratana and Savang Vadhana.