Samroeng Chaiyong (Thai: สำเริง ไชยยงค์), born Samruay Chaiyong (สำรวย ไชยยงค์, 2 February 1933/34[a] – 11 March 2019), was a Thai football player and coach, army major-general, and royal courtier.
Samroeng was born Samruay in Selaphum District, Roi Et Province.
[2] He was a member of the Thailand men's national football team, playing in its first Olympics football competition at Melbourne 1956, and was later chosen by the Football Association of Thailand to attend a coaching course in Germany in 1961, after which he received a royal scholarship to complete pro-licence training at the German Sport University Cologne.
In 1968 he established the Rajvithi Football Club, which became one of the most successful Thai clubs in the 1970s, and helped to train a generation of Thai national team players, including five of his younger brothers.
[1][3] As a football instructor at Chitralada School, he coached Prince Vajiralongkorn (later the king), and was named an army officer in the King's Guard and served as a guardian of the Prince during his studies at the Royal Military College, Duntroon in Australia.