Prime Minister of Thailand Rajanubhab took over this role. In fact, the office most considered the precursor of that of the prime minister was the ancient office of "Samuha Nayok" (สมุหนายก), which was run by an "Akkhra Maha Senabodi" (อัครมหาเสนาบดี) or "chief minister in charge of civilian affairs". The first Prime Minister of Siam was Phraya Manopakorn Nititada, a judge. The title of the office was changed from "Prime Minister "of Siam"" to "Prime Minister "of Thailand"" in 1945 and then permanently with the renaming of Siam to Thailand in 1949. For most of its existence the office has been occupied by Army leaders;
Prime Minister of the West Indies Federation Prime Minister of the West Indies Federation This is a list of the Prime Ministers of the West Indies Federation (also known as the British Caribbean Federation), consisting of ten provinces: Antigua (with Barbuda), Barbados, Dominica, Grenada, Jamaica (with the Cayman Islands and the Turks & Caicos Islands), Montserrat, St. Christopher-Nevis-Anguilla, St. Lucia, St. Vincent, and Trinidad and Tobago. The Federation was formed on 3 January 1958, and was formally dissolved on 31 May 1962. The Prime Minister was elected by the House of Representatives from among its members, constitutionally acted as an advisor to the Governor-General of the West