also known unofficially as Ratchakan thi n ('the nth Reign'); hence, the present King's reign is also known as Ratchakan thi sip ('the tenth reign') and extrapolated back to all the earlier kings of the dynasty. Since King Vajiravudh called himself Rama VI in English, the name was seemingly equivalent to Thai Ratchakan thi hok. This rough translation is still in use today, but no other king in the dynasty before him used the name "Rama" as such. However, there have been several kings in the Ayutthaya and Thonburi periods who are best known by the title Ramathibodi ("Overlord Rama"). Ayutthya itself was borrowed from the name of Rama's capital in the Ramayana epic, Ayodhya. Still, most of the names of the earlier kings as given by historians are titles rather than real names. It was not customary to refer to a king by his name during his lifetime, and in many cases, the personal names of the kings are not known. Even the titles are often doubtful. Each king had his full style and title inscribed on a golden plate, which, however, were all lost when the Ayutthaya Kingdom was destroyed in the sack of the city by the Burmese in 1767. Chakri Kings of Thailand King Rama I (1782–1809), Phutthayotfa Chulalok (27 years) King Rama II (1809–1824), Phutthaloetla Naphalai (15 years) King Rama III (1824–1851), Nangklao (27 years) King Rama IV (1851–1868), Mongkut (17 years) King Rama V (1868–1910), Chulalongkorn (42 years) King Rama VI (1910–1925), Vajiravudh (15 years) King Rama VII (1925–1935), Prajadhipok (10 years) King Rama VIII (1935–1946), Ananda Mahidol (11 years) King Rama IX (1946–2016), Bhumibol Adulyadej (70 years) King Rama X (2016–present), Vajiralongkorn See also Monarchy of Thailand List of Thai monarchs Regnal name References External links Kings of the Chakri Dynasty, and Overview of the Kings of Thailand Thai royal titles Chakri dynasty