Thanphuying Poonsapaya Navawongs na Ayudhya (Thai: พูนทรัพย์ นพวงศ์ ณ อยุธยา,[lower-alpha 1] also spelled Poonsap Noppawong, 12 October 1910 – 23 October 2015) was a Thai educator. She was a professor at Chulalongkorn University, where she founded the Faculty of Education and was its first dean, and contributed extensively to the development of teacher education and education administration in Thailand. She has been recognized as one of the foremost contributors to education in the country.
Poonsapaya was born on 12 October 1910 in tambonSi Kak Phraya Si (now in Bangkok‘s Phra Nakhon District). She was originally named Nu (หนู).[lower-alpha 2] Her father, Hans Geyer, was a German expatriate jeweller who had frequent contact with the royal ladies in Phayathai Palace; her mother Mrs Chiam was a lady-in-waiting of Suan Sunanda Palace. At the age of three-and-a-half, her parents presented her to Queen Saovabha Phongsri, who gave her the name Poonsapaya, and placed her under the care of Princess Valaya Alongkorn. (Poonsapaya would later adopt the Thai-icized surname Kraiyong (ไกรยง).[lower-alpha 3])
She grew up in the palace, and attended Rajini School. She graduated from the Faculty of Arts and Science at Chulalongkorn University and joined the civil service, before earning a scholarship for a master’s degree in education psychology at the University of Michigan. She had begun a doctorate at the University of Wisconsin–Madison when Thailand joined World War II against the United States. The government ordered her return, but she decided to join the Free Thai resistance movement as a radio broadcaster assisting the Allies instead.