In 1944, Galyani Vadhana renounced her royal status in order to marry Colonel Aram Rattanakul Serireongrit (24 August 1920 – 3 February 1982), the son of General Luang Serireongrit (Charun Rattanakun Seriroengrit), a former Army commander-in-chief who led the invasion of the Shan States during World War II.

On 6 May 1995, Galyani Vadhana's 72nd birthday, her brother King Bhumibol gave her the noble title "Kromma Luang Naradhiwas Rajanagarindra" (loosely translated, Princess of Naradhiwas), making her the only female member of the Chakri royal family to have been bestowed this title during Bhumibol's reign.

[3] In announcing the honour, Bhumibol said, "the Princess, who was his only sister, had shared the joys and sorrows of life since their early years and was the most highly respected in that she had always given him support.

Galyani Vadhana's royal patronage projects included traditional Thai arts, education, sports, and social welfare.

[citation needed] Galyani Vadhana was admitted to Siriraj Hospital in June 2007, suffering from abdominal pains.

In October 2007, doctors reported that Galyani Vadhana had suffered an infarction on the left side of her brain as a result of occlusion of a cerebral artery.

[4] At the same time in October, King Bhumibol was treated at Siriraj after experiencing weakness on his right side; doctors later found that he had a blood shortage to his brain.

On 14 December, the Royal Household Bureau released its 25th statement about Galyani Vadhana's health, saying she was feeling increasingly tired and was becoming less responsive.

[12] On 15 November, there were three processions from the royal throne hall, where she had lain in state for ten months, comprising 3,294 soldiers, flanked by conch shell-blowers, drummers, and musicians.

[14] In Uttaradit, black-dressed Thais flocked to the royally sponsored Wat Klong Poh in the provincial seat to place 400,000 sandalwood flowers at the crematorium.

[15] At 22:00 on 15 November, the king and Queen Sirikit, with the help of a hydraulic tappet, set alight a 40-metre-high (130 ft) funeral pyre.

The $5.7 m (£3.8 m) temporary royal crematorium, a complex of pavilions constructed on the Sanam Luang parade ground over seven months, had been decorated with flowers, garlands, and carved banana stalks.

According to Hindu belief, Galyani Vadhana's spirit then returned home to Mount Meru, where all deities eternally live.

When Galyani Vadhana was nine, she published a journal, Ruaen Rom, containing articles she had written with her friends at Srapathum Palace.

The fund supported classical music and related activities, provided assistance to Thai musicians to study, and promoted competitions and concerts in Thailand and internationally.

As a result of her continuous work in the teaching and research of the French language in Thailand, she was conferred many honorary doctorates and also honors from many foreign governments and international organizations, including UNESCO.

In 1964, while the Mother Princess was staying at Phu Phing Palace, Chiang Mai, she realised how poor the local populace were especially in food and medicine.

Her thinking was that the public and local administration organization co-operate to look after forest, water, wildlife, and rare flora to maintain natural balance.

In addition to strengthening friendly relations with those countries, her visits helped spread knowledge of Thai culture and customs.

In 2003 she visited Gretzenbach in Switzerland to officially dedicate the Wat Srinagarindravararam, a temple named in honour of her mother.

With Galyani Vadhana's support, the Kidney Foundation of Thailand coordinated with the Ministry of Public Health in its construction.

Following the celebration of Galyani Vadhana's seventy-second birthday in 1995, her permission was sought to name the building after her, which she permitted, and dedicated it on 20 May 1994.

The building supports the treatment of terminal chronic renal failure patients with 46 artificial kidney machines.

Naradhiwas Rajanagarindra Road runs through Bang Rak, Sathon, and Yan Nawa Districts of Bangkok.

Upon completion, the Bangkok Metropolitan Administration asked for permission to name it for Galyani Vadhana, and the king consented in 1996.

Princess of Naradhiwas University was established by an act of 9 February 2005 merging all educational institutions in Narathiwat Province.

The Princess's style and title in full: Somdet Phrachao Phinangthoe Chaofa Galyani Vadhana Krommaluang Naradhiwas Rajanagarindra (Thai: สมเด็จพระเจ้าพี่นางเธอ เจ้าฟ้ากัลยาณิวัฒนา กรมหลวงนราธิวาสราชนครินทร์)