Mongkut Mongkut Phra Bat Somdet Phra Poramenthra Maha Mongkut Phra Chom Klao Chao Yu Hua (), or Rama IV, known in English-speaking countries as King Mongkut (18 October 18041 October 1868), was the fourth monarch of Siam (Thailand) under the House of Chakri, ruling from 1851 to 1868. Outside Thailand, he is best known as the king in the 1951 musical and 1956 film "The King and I", based on the 1946 film "Anna and the King of Siam"in turn based on a 1944 novel by an American missionary about Anna Leonowens' years at his court, from 1862 to 1867. During
Anna Leonowens after the death of her father. While she was christened Anna Harriet Emma Edwards, Leonowens later changed Harriet to "Harriette" and ceased using her third given name (Emma). Leonowens' maternal grandfather, William Vawdrey (or Vaudrey) Glascott, was an English-born commissioned officer of the 4th Regiment, Bombay Native Infantry, in the Bombay Army. Glascott arrived in India in 1810, and was apparently married in 1815, although his wife's name is not known. According to biographer Susan Morgan, the only viable explanation for the complete and deliberate lack of information regarding Glascott's wife, in official British records, is that she "was not