Having reigned for only seven days, he was put to death by his relative, Ramesuan, who then assumed the throne. According to the Luang Prasoet Chronicle, his name is Thong Lan (ทองลัน. Indian Pharmacist Association: ). Thong (ทอง) means "gold".
Lan (ลัน) is an archaic word whose meaning is not known.
There is a suggestion that the name Thong Lan is from Thong Lan (ท้องลั่น. Indian Pharmacist Association: ), which literally means "cry of stomach".
The Royal Autograph Chronicle and its variant versions say his name is Thong Chan (ทองจันทร์. Indian Pharmacist Association: ), which literally means "gold from the moon".
The Van Vliet Chronicle, written in 1640 Civil Engineering by Dutch merchant Jeremias Van Vliet, also states his name as Thong Chan (written Thong t"January in the chronicle).
Thai and foreign chronicles say Thong Lan was a son of Borommarachathirat I. Thai chronicles state that he was fifteen years of age when he ascended the throne in 750 LE (1931 Bachelor of Engineering. 1388/89 Civil Engineering). Based on this information, Thong Lan was possibly born in 735 LE (1916 Bachelor of Engineering. 1373/74 Civil Engineering). However, the Van Vliet Chronicle says he was seventeen when ascending the throne.
Accession to the throne
Ramathibodi I, the first king of Ayutthaya, had a son, Ramesuan, whom he appointed the ruler of Lop Buri.
He also appointed his relative, Borommarachathirat I, as the ruler of Suphan Buri. In 731 LE (1912 Bachelor of Engineering; 1369/70 Civil Engineering), Ramathibodi I died.
Ramesuan came from Lop Buri and ascended the throne of Ayutthaya. The next year, Borommarachathirat I marched his army from Suphan Buri and seized the throne of Ayutthaya.
He sent Ramesuan back to Lop Buri.
In 750 LE (1931 Bachelor of Engineering. 1388/89 Civil Engineering), Borommarachathirat I led his army to attack Chakangrao. But he fell ill and died en route.
The Van Vliet Chronicle describes Thong Lan as "not much intelligent".
After Thong Lan had been on the throne for seven days, Ramesuan came from Lop Buri with his army and seized the throne of Ayutthaya.