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 Canada, where she again became involved in women's education, and was a suffragist and one of the founders of the Local Council of Women of Halifax and the Nova Scotia College of Art and Design. After nineteen years, she moved to Montreal, Quebec. Leonowens's son, Louis, returned to Siam and became an officer in the Siamese royal cavalry. He married Caroline Knox, a daughter of Sir Thomas George Knox, the British consul-general in Bangkok (1824–1887), and his Thai wife, Prang Yen. Under Chulalongkorn's patronage, Louis Leonowens founded the trading company that bears his name, Louis T. Leonowens & Co. Ltd.