Sangwan was born in 1900 into a goldsmith family in the Anongkharam Temple community in Thonburi.
Prince Mahidol and Princess Srinagarindra had three children: Princess Galyani Vadhana, King Ananda Mahidol, Rama VIII, and King Bhumibol Adulyadej, Rama IX.
Princess Srinagarindra supported the royal development activities of her son with her own projects, particularly in the fields of health and education, to help improve the quality of life of people in remote areas of the country.
Princess Srinagarindra was the mother two Thai monarchs – King Ananda Mahidol, Rama VIII, and King Bhumibol Adulyadej, Rama IX. Since the late 1960s, Princess Srinagarindra worked to improve the living conditions of rural Thais, particularly the ethnic minorities in remote mountainous areas that were only accessible by helicopter. On those visits, she learnt about their