Chai (king of Ayutthaya)

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King of Ayutthaya
King of Siam
Reign8-9 August 1656
PredecessorPrasat Thong
SuccessorSi Suthammaracha
Died11 August 1656
Khokphraya Temple, Ayutthaya, Ayutthaya Kingdom
Full name
Sanphet VI
HousePrasat Thong Dynasty
FatherPrasat Thong

Chai (Thai: ไชย), full title in Thai Somdet Chaofa Chai (Thai: สมเด็จเจ้าฟ้าไชย) or King Sanpet VI, was a king of Ayutthaya, reigning for 1 day in August 1656.[1]

Reign and Overthrow[edit]

Upon King Prasat Thong’s death in 1656, Chaofa Chai, his eldest son, succeeded his father as King Sanpet VI.

However, it was a Thai tradition gave brothers a higher priority over sons in succession. Prince Si Suthammaracha, Chaofa Chai's uncle, plotted with his nephew, Prince Narai, to bring Sanpet VI down. After nine months of ascension, Sanpet VI was executed following a coup.[2]:216–217[3]:56 Narai and his uncle marched[4] into the palace, and Si Suthammaracha crowned himself king. Si Suthammaracha appointed Narai as the Uparaja, or the Front Palace.


  1. ^ van der Cruysse, D. (2002). Siam and the West, 1500-1700, Silkworm Books
  2. ^ Rajanubhab, D., 2001, Our Wars With the Burmese, Bangkok: White Lotus Co. Ltd., ISBN 9747534584
  3. ^ Chakrabongse, C., 1960, Lords of Life, London: Alvin Redman Limited
  4. ^ Wyatt, DK (1984). Thailand: A Short History. Chiang Mai: Silkworm. p. 107.
Chai (king of Ayutthaya)
Born: ? Died: 1656
Regnal titles
Preceded by
Prasat Thong
King of Ayutthaya
Nine months in 1656
Succeeded by
Si Suthammaracha