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King of Ayutthaya
King of Ayutthaya
Reign Seven days in 750 ME
(1388–89 CE)
Predecessor Borommarachathirat I
Successor Ramesuan
Dynasty Suphannaphum
Father Borommarachathirat I
Born 735 ME (1373–74 CE)
Died 750 ME (1388–89 CE)
Wat Khok Phraya (in present-day Phra Nakhon Si Ayutthaya Province, Thailand)

Thonglan (Thai: ทองลัน) was the fourth king of Ayutthaya, an ancient city-state in present-day Thailand. He was a son of Borommarachathirat I.[1] In 750 ME (1931 BE; 1388–89 CE), he succeeded his father to the throne of Ayutthaya at the age of fifteen.[1] Having reigned for only seven days, he was put to death by his relative, Ramesuan, who then assumed the throne.[2]


According to the Luang Prasoet chronicle, his name is Thonglan (ทองลัน; Thai pronunciation: [tʰɔ̃ːŋ˧.lä̃n˧]).[3] Thong (ทอง) means "gold". Lan (ลัน) is an archaic word whose meaning is not yet known.[4] There is a suggestion that the name Thonglan is from Thonglan (ท้องลั่น; Thai pronunciation: [tʰɔ̃ːŋ˦˥.lä̃n˥˩]), which literally means "cry of stomach".[5]

The Royal Autograph chronicle and its variant versions say his name is Thongchan (ทองจันทร์; Thai pronunciation: [tʰɔ̃ːŋ˧.t͡ɕä̃n˧]),[2] which literally means "gold from the moon". The Van Vliet chronicle, written in 1640 CE by Dutch Merchant Jeremias Van Vliet, also states his name as Thongchan (written Thong t'Jan in the chronicle).[6]



Thai and foreign chronicles say Thonglan was a son of Borommarachathirat I.[1] Thai chronicles state that he was fifteen years of age when he ascended the throne in 750 ME (1931 BE; 1388–89 CE).[1] Based upon this information, Thonglan was possibly born in 735 ME (1916 BE; 1373–74 CE). However, the Van Vliet chronicle says he was seventeen when ascending the throne.[6]

Ascension to the throne[edit]

Ramathibodi I, the first king of the city-state of Ayutthaya, had a son, Ramesuan, whom he appointed the ruler of Lop Buri.[7] He also appointed his relative, Borommarachathirat I, as the ruler of Suphan Buri.[8] In 731 ME (1912 BE; 1369–70 CE), Ramathibodi I died. Ramesuan came from Lop Buri and ascended the throne of Ayutthaya.[9] The next year, Borommarachathirat I marched his army from Suphan Buri to Ayutthaya and seized the throne. He sent Ramesuan back to Lop Buri.[8]

In 750 ME (1931 BE; 1388–89 CE), Borommarachathirat I led his army to attack Chakangrao. But he fell ill and died en route.[10] His son, Thonglan, then succeeded to the throne.[1] The Van Vliet chronicle describes Thonglan as "not much intelligent".[6]


After Thonglan had been on the throne for seven days, Ramesuan marched his army from Lop Buri to Ayutthaya and seized the throne. Ramesuan had Thonglan executed at Wat Khok Phraya, a Buddhist temple near the palace.[2]



  • Phra Ratchaphongsawadan Chabap Phra Ratchahatthalekha Lem Nueng พระราชพงศาวดาร ฉบับพระราชหัตถเลขา เล่ม 1 [Royal Chronicle of Siam: Royal Autograph Version, Volume 1] (in Thai) (8th ed.). Bangkok: Fine Arts Department of Thailand. 1991. ISBN 9744171448. 
  • Prachum Phongsawadan Chabap Kanchanaphisek Lem Nueng ประชุมพงศาวดาร ฉบับกาญจนาภิเษก เล่ม 1 [Golden Jubilee Collection of Historical Archives, Volume 1]. Bangkok: Fine Arts Department of Thailand. 1999. ISBN 9744192151. 
  • Princess Maha Chakri Sirindhorn Foundation (2011). Namanukrom Phra Mahakasat Thai นามานุกรมพระมหากษัตริย์ไทย [Directory of Thai Kings] (in Thai). Bangkok: Princess Maha Chakri Sirindhorn Foundation. ISBN 9786167308258. 
  • Van Vliet, Jeremias (2003). Wyatt, David K., ed. Phongsawadan Krung Si Ayutthaya Chabap Wan Walit Phutthasakkarat Song Phan Nueng Roi Paet Sip Song พงศาวดารกรุงศรีอยุธยา ฉบับวันวลิต พ.ศ. 2182 [1640 Chronicle of Ayutthaya: Van Vliet Version] (in Thai) (2nd ed.). Bangkok: Matichon. ISBN 9743229221. 
Born: 735 ME (1373–74 CE) Died: 750 ME (1388–89 CE)
Regnal titles
Preceded by
Borommarachathirat I
King of Ayutthaya
Seven days in
750 ME (1388–89 CE)
Succeeded by