Poonsapaya Navawongs na Ayudhya  Thanphuying Poonsapaya Navawongs na Ayudhya (, 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 "tambon" Si Kak Phraya Si (now in Bangkok's Phra Nakhon District). She was originally named Nu (). 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 ().) 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. After the war, Poonsapaya briefly audited at Columbia University before returning to Thailand. (She would later receive a graduate diploma in education administration from Columbia in 1963.) She then began working at Chulalongkorn University. At the time, the university's teacher training programme was a department under the Faculty of Arts and Sciences (now the Faculty of Arts), teaching a one-year course. Poonsapaya pushed for its expansion into a two-year programme, and later worked to establish a full faculty. The Faculty of Education was founded in 1957. Poonsapaya served as its dean—the first woman in Thailand to hold such a position—until her retirement fourteen years later, after which she continued teaching as professor emeritus.