Thong Lan

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

Thong Lan (Thai: ทองลัน) was a king of Ayutthaya, an ancient kingdom in Thailand.

A son of Borommarachathirat I and member of the House of Suphannaphum, Thong Lan succeeded his father to the throne of Ayutthaya in 750 LE (1931 BE, 1388/89 CE) at the age of 15. Having reigned for only seven days, he was deposed and executed in a coup by Ramesuan, his relative from the House of Uthong.

Thong Lan was the first monarch of Ayutthaya to be executed.

The child king is known as Thong Lan (Thai: ทองลัน; IPA: [tʰɔ̃ːŋ˧.lä̃n˧]) in most historical sources, including the British Museum Chronicle, the Luang Prasoet Chronicle, and the Phan Channumat Chronicle.

Thong (Thai: ) means "gold". Lan (Thai: ลัน) is an archaic word whose meaning is not known.

Historian Suchit Wongthet (Thai: สุจิตต์ วงษ์เทศ) expressed the opinion that lan here is an old Thai–Lao term which encyclopediae say refers to "eel trap made of bamboo". The historian stated that naming a person after an animal trapping device was an ancient practice, citing the personal name of King Rama I, Thong Duang (Thai: ), which means "golden snare".

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