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Mahidol Adulyadej มหิดลอดุลยเดช
Prince Father of Thailand
Mahidol Adulyadej, c. 1914–1929
Born	(1892-01-01)1 January 1892 Bangkok, Siam
Died	24 September 1929(1929-09-24) (aged 37) Bangkok, Siam
Burial	16 March 1930 Royal Crematorium, Sanam Luang, Bangkok
Spouse	Sangwan Talapat ​ (m. 1920)​
Issue Detail	Galyani Vadhana, Princess of Naradhiwas Ananda Mahidol (Rama VIII) Bhumibol Adulyadej (Rama IX)
Names Mahidol Adulyadej Naresuan Maharajadhibodindra Chulalongkoranindravarangkun Sombunbenjabhon Sirisavati Khattiya Warophatosuchati Kunnasangkatkiatprakit Laksanavichit Phisitburut Chanuttamarat Phattanasak Akavorarajakumarn Posthumous name Mahitala Dhibesra Adulyadej Vikrom
House	Mahidol (Chakri dynasty)
Father	Chulalongkorn (Rama V)
Mother	Savang Vadhana
Religion	Theravada Buddhism
Signature
Military career
Allegiance	Kingdom of Siam
Branch	Royal Siamese Army Royal Siamese Navy
Years of service	1908–1914
Rank	Senior Colonel Admiral of the fleet (posthumous)

Styles of Prince Mahidol Adulyadej Prince Father of Thailand
Reference style	His Royal Highness
Spoken style	Your Royal Highness

Mahitala Dhibesra Adulyadej Vikrom, the Prince Father^[1] (Thai: สมเด็จพระมหิตลาธิเบศร อดุลยเดชวิกรม พระบรมราชชนก RTGS: Somdet Phra Mahitalathibet Adunyadetwikrom Phra Borommaratchachanok, 1 January 1892 – 24 September 1929), formerly Prince Mahidol Adulyadej, Prince of Songkhla (Thai: สมเด็จเจ้าฟ้ามหิดลอดุลยเดช กรมหลวงสงขลานครินทร์) or Mahidol Songkla, was the father of King Ananda Mahidol (Rama VIII) and King Bhumibol Adulyadej (Rama IX) of Thailand, and the paternal grandfather of King Vajiralongkorn (Rama X). He was also regarded as the father of modern medicine and public health in Thailand. He also founded the House of Mahidol or the present Royal Family of Thailand.^[2] His two sons reigned for more than eight decades, longer than the Ibn Saud siblings of Saudi Arabia, and the Nahyan siblings of Abu Dhabi.

Prince Mahidol was the 69th child of King Chulalongkorn and the 7th of Queen Savang Vadhana. His mother also adopted four other royal princes whose commoner mother (Chao Chom Manda) had died; among them was Prince Rangsit Prayulsak, later Prince of Chainat, who became a very close friend of Prince Mahidol during his childhood. Later in their lives, Prince Rangsit would play a pivotal role in Mahidol's career, and would later be appointed regent to one of Mahidol's sons, Bhumibol.

Like the other sons of King Chulalongkorn, Prince Mahidol started his education at the Royal School within the Grand Palace. He received the title of Prince of Songkla at age 13.

He was sent to London in 1905, and after spending a year and a half in Harrow School, he moved to Germany to join the Royal Prussian Military Preparatory College at Potsdam according to the wish of his father, then continued his military education at the Imperial Military Academy at Groß–Lichterfelde in Berlin. Following the wish of his half-brother, King Vajiravudh, he then entered the Imperial German Naval Academy at Flensburg-Mürwik. While there, he won a competition in submarine design. He was commissioned Lieutenant in both the Imperial German Navy and the Royal Thai Navy in 1912.

The start of World War I compelled the Prince to come back to Thailand in 1914; he was assigned to a teaching post at the Royal Naval Academy. He continued his interest in smaller vessels, including submarines and torpedo boats; this later led to conflict at a meeting, where he was overruled by senior naval officers, most of whom were British graduates and preferred larger vessels. The Prince, feeling that his expertise would never be used, resigned his post nine months after joining the Navy.

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His half-brother and old friend Prince Rangsit then came into play. He was at that time Chief of the Royal Medical College. Medical and public health education at that time lagged behind the Western standard. The Medical College and its hospital, Siriraj, were small, crowded, underfunded, understaffed and ill-equipped.

Prince Rangsit, himself a lesser-class prince (as his mother was a commoner), thought that to have someone of high prestige like Prince Mahidol (who was a first-class celestial prince as he was born to a royal mother who was also a daughter of a king) supporting the movement to improve medical practice and public health in Thailand would generate more interest and probably more funding. He strategically invited Prince Mahidol to a boat trip along the Bangkok Yai and Bangkok Noi canals. His office, Siriraj Hospital, was on the route, and this was where he invited his half-brother to stop and have a look around. Having seen Mahidol's reaction to the poor state of the hospital, Prince Rangsit asked him if he wanted to help; Mahidol's answer at that time was, however, not very positive as he was concerned that he knew nothing about medicine himself. However, a few days elapsed and he agreed to help. He also decided he would study in related fields himself.

Thus the Prince went to Cambridge, Massachusetts to study public health at Harvard. He also asked Prince Rangsit to select four students to be sent to the U.S.: two medical students who would be funded by Mahidol himself and two nursing students who would be funded by his mother, Queen Savang Vadhana. It was said that the Prince went to the train station to greet the students himself. This was when an unintended sequel of Prince Rangsit's scheme occurred: one of the nursing students who arrived was the 18-year-old Miss Sangwal Talabhat, future wife of Prince Mahidol and mother of two future kings of Thailand. Mahidol diligently looked after his students, and thus became close to Miss Talabhat, who then accompanied him back to Thailand three years later to attend the funeral of Queen Saovabha. While there, they married under the royal blessing of his half-brother King Vajiravudh at Sapathum Palace before returning to Harvard. He received his Certificate in Public Health in the following year (1921).

After his study, he went to Edinburgh for a break but was also asked to represent the Thai government in liaising with the Rockefeller Foundation, which was offering monetary and technical help to improve Thailand's medical and public health education. His first child, Princess Galyani Vadhana, was born in London in 1923. He returned to Thailand in the same year to take the position of Director-General of the University Department in the Ministry of Education. Apart from his administrative duties, he also taught pre-clinical medical students at the Royal Medical College.

In 1925 he went to Heidelberg, Germany to have his kidneys treated before going back to his alma mater Harvard University, this time to study medicine. It was in Heidelberg where his first son Prince Ananda Mahidol was born in the same year. His youngest son Prince Bhumibol was born in Massachusetts in 1927; six months later he received his M.D. cum laude.^[3] He returned to Thailand in December 1928.

One of the first things he did when he returned was to set up scholarships for students in the fields of medicine, nursing, and public health. He was planning to return to Siriraj Hospital for an internship. However, his princely status then became a problem as it was felt that he was too prestigious to be allowed an internship. Undeterred, Mahidol chose another hospital in a more egalitarian environment – the missionary-run McCormick Hospital in Chiang Mai. He worked there, day and night, as a resident doctor. His patients fondly called him "Mho Chao Fa" ('Doctor Prince').

Before long, complications with his kidney problems resurfaced. Three weeks after he started working, he visited Bangkok to attend the funeral of his uncle, and was never able to return to Chiang Mai. It appeared that he also had liver abscess, and his health continually deteriorated. Prince Mahidol died on 24 September 1929 at Sapathum Palace.

He was posthumously given the title of the Prince Father (Somdej Phra Mahittalathibet Adulyadejvikrom Phra Borommarajachanok – สมเด็จพระมหิตลาธิเบศ อดุลยเดชวิกรม พระบรมราชชนก) with a special royal rank equivalent to front palaces.

Prince Mahidol of Songkla taught at Chulalongkorn University. Apart from being an instructor and administrator at the university, he was also of one of its great benefactors. He donated a large amount of his own fortune to set up scholarships which enabled university lecturers in science and medicine to further their studies. He negotiated with Rockefeller Foundation in helping the university improve from its poor academic foundation.^[4]

His legacies remain to this day. The students sent abroad under his scholarships became key players in modern medicine of Thailand: many were regarded as great teachers, and some helped establish new medical schools and universities. The Royal Medical School later became the Faculty of Medicine Siriraj Hospital, Chulalongkorn University. It was key source of faculty of Medical University when it was founded in 1943. In 1969 the Medical University was granted the Prince's name by royal decree and became Mahidol University. The "Prince of Songkla" title became the name of Prince of Songkla University in 1967.

In commemoration of the centenary of the Prince's birth, the Prince Mahidol Award was created in 1992. This is an international award in the fields of medicine, public health, and social services. The anniversary of his passing is observed as Mahidol Day.

The following places are named after him:

Public health institute

• Praboromarajchanok Institute, Ministry of Public Health (Thailand)
• Collaborative Project to Increase Production of Rural Doctor, Mahidol University

Academy

• Mahidol University
• Mahidol University International Demonstration School
• Prince Mahidol Hall, Mahidol University
• Prince of Songkla University
• Mahidol Wittayanusorn School
• PSU Wittayanusorn School
• Prince of Songkla University Demonstration School
• Mahittalathibet Building, Faculty of Commerce and Accountancy, Chulalongkorn University
• Mahittalathibet Building, Faculty of Public Health, Burapha University^[5]

Species

• Mahidolia mystacina (Valenciennes, 1837)^[6]

Others

• Prince Mahidol Award
• Mahidol Road, Chiang Mai Province
• Mahidol Adulyadej Naval Base
• Krommaluang Songkhla Nakharin Army Camp

• Senior Colonel,^[7] Admiral of the Fleet^[8][9]

• Colonel of the Wild Tiger Corps^[10]

• Chancellor of Minister of Education (Siam)^[9][10]

• Srinagarindra
• Galyani Vadhana
• Ananda Mahidol
• Bhumibol Adulyadej
• Chulalongkorn University
• Mahidol University
• Prince of Songkla University
• Mahidolia mystacina

• Biography of Prince Mahidol of Songkla, Bangkok Post site
• Biography of Prince Mahidol and his work at Siriraj Hospital
• Prince Mahidol Award Foundation