Prince Svasti Sobhana, the Prince Svastivatana Visishtha was a son of King Mongkut and Princess Consort Piam. As the sixtieth child of King Mongkut, he also had the same parents as the 3 queens of Kin

Princess Piyamavadi Sri Bajarindra Mata or Chao Khun Chom Manda Piam née Piam Sucharitakul, was one of the royal wives of King Mongkut. All three of her daughters became queens.