SHORT HISTORY: HRH Prince Rangsit Prayurasakdi, the founder of the family, was the fifty-second child of HM King Chulalongkorn, 5th King of Siam of the Chakri Dynasty, and his twenty-second wife, Chao Chom Manda Nueng (née Mom Rajawongse Nueng Snidvongs). He was granted the title of Prince of Jainad/Chainat in 1922.

• HRH Prince Rangsit Prayurasakdi, The Prince of Jainad, born 12th November 1885 in Bangkok, he was granted the rank and style of Somdej Phra Chao Boromawongse Ther Krom Phraya Jainad Narendhorn in 1922; educated at the Royal School in the Grand Palace, Bangkok and in 1899 he was sent to Germany for further schooling, firstly at the Martineum gymnasium in Halberstadt (graduated 1905), then at Heidelberg University in Heidelberg, and he studied jurisdiction at the Ruprecht Karl University of Heidelberg, he returned to Siam in 1913 and worked to improve Siam's health care and university systems, serving as the first Director-General of the University Affairs Department, and the Chairman of the Committee on Planning and Development of Chulalongkorn University; following the Siamese Revolution of 1932, he was arrested on a charge of treason and was jailed in 1938, he was only released in 1943, he was appointed as Regent on 16th June 1946, as well as chairman of the Supreme Council of State from 1947; married 28th August 1912 in London, Mom Elisabeth Rangsit na Ayudhaya (née Scharnberger), born 15th September 1892, died 29th September 1973, and had issue. He died 7th March 1951 in Bangkok.

  • HSH Prince (Mom Chao) Piyarangsit Rangsit, born 25th December 1913, married 1stly, 28th April 1934, Mom Rajawongse Bongselaksana Thongyai, born 8th November 1914, daughter of HSH Prince Thongthikayu Thongyai, married 2ndly, HSH Princess Vibhavadi Rajani [HRH Princess Vibhavadi Rangsit], born 20th November 1920 in Bangkok, died 16th February 1977 in Surat Thani, daughter of HRH Prince Rajani Chamcharas, The Prince Bidyalongkorn, married 3rdly, Mom Bidaksa (née Saengriddhi), and had issue. He died 1st February 1990.

    • Mom Rajawongse Yaovalaksana Rangsit (by M.R. Bongselaksana), born 2nd May 1938.

    • Mom Rajawongse Vibhananda Rangsit (by Princess Vibhavadi), born 2nd October 1947.

    • Mom Rajawongse Priyanandana Rangsit (by Princess Vibhavadi), born 3rd July 1952, married 10th May 1978, Maharaj Shri Jagat Singhji, Raja Saheb of Isarda in India, born 15th October 1949, died 5th February 1997, son of HH Maharajadhiraj Sri Sir Man Singhji II Bahadur, Maharaja of Jaipur, and his third wife, HH Maharani Gayatri Devi, and has issue.

      • Rajkumari Lalitya Kumari, born 3rd February 1979.

      • Maharaj Shri, Devraj Singh, born 13th February 1981, Raja Saheb of Isarda 1997/-.

    • Mom Rajawongse Pradaksa Rangsit (by Mom Bidaksa), born 10th July 1969.

  • HSH Prince Sanidh Prayurasakdi Rangsit, born 19th August 1917, married 1stly, 27th July 1946, Mom Amelia (née Montalti), born 30th January 1916, married 2ndly, 2nd April 1953, Mom Nalini (née Sukhanil), born 24th October 1936, married 3rdly, 9th January 1959, Mom Christine (née Clerc), born 14th August 1934, and had issue. He died 10th September 1995.

    • Mom Rajawongse Bongsesanidh Rangsit (by Mom Nalini), born 4th April 1954, married 13th January 1986, Somchai Loes-Suvarnarajta, born 2nd February 1960.

    • Mom Rajawongse Charuvan Rangsit (by Mom Nalini), born 3rd August 1956, married 9th September 1978, Alexandre Sursock, born 30th December 1948, son of Cyril Sursock, and his wife, Catherine Beriketti (she married 2ndly, Prince Sadruddin Aga Khan, see that family), and had issue.

      • Alexandre Kim Sursock, born 15th March 1980.

      • Ayesha Sursock

    • Mom Rajawongse Saisanidh Rangsit (by Mom Nalini), born 2nd June 1958, married 6th January 1984, Piyalaksana Praoprembutra, born 9th October 1956.

    • Mom Rajawongse Valailak Rangsit (by Mom Christine), born 14th June 1959, married 9th September 2000, Brian Christopher Gaudet, and has issue, two daughters.

      • Miss Amy Marissa Gaudet, born 11th May 2001.

      • Miss Angela Kalyani Gaudet, born 17th March 2004.

  • HSH Princess Charulaksana Kalyani Rangsit, born 7th August 1924, she relinquished her royal title to marry a commoner on 28th June 1945.