Thai Sa
| Thai Sa ท้ายสระ | |
|---|---|
| King of Ayutthaya | |
Statue of King Thai Sa at Wat Pa Mok, Pa Mok district, Ang Thong province | |
| King of Siam | |
| Reign | 1708 – 13 January 1733 |
| Predecessor | Sanphet VIII |
| Successor | Borommakot |
| Born | 1678 |
| Died | 13 January 1733 (aged 54–55) Ayutthaya, Ayutthaya Kingdom |
| Spouse | Rachanurak |
| Issue | 9 sons and daughters |
| House | Ban Phlu Luang |
| Father | Sanphet VIII |
| Mother | Phanwasa |
Prince Phet (Thai: เจ้าฟ้าเพชร, Thai pronunciation: [pʰet̚˦˥]), later known as King Thai Sa (Thai: พระเจ้าท้ายสระ, Thai pronunciation: [pʰra˦˥ t͡ɕaːw˥˩ tʰaːj˦˥ saʔ˨˩]) and formally styled as the King of Banyongrattanat Palace (Thai: สมเด็จพระที่นั่งบรรยงค์รัตนาสน์), was the King of the Ayutthaya Kingdom from 1709 to 1733 and the third ruler of the Ban Phlu Luang dynasty. The name "Thai Sa" (lit. "behind the pool") refers to the Banyongrattanat Palace, which was located by a pool where he often resided.