[2] According to historian Edward van Roy, Pan was the son of Phraya Kiat, a Mon noble who sided with Naresuan during the fourth Burmese-Siamese War, and Chao Mae Wat Dusit, daughter of King Ekathotsarot and wet nurse for Phetracha and Prince Narai, both future kings of Siam.

As his mother was a wet nurse for the young prince Narai, Pan was considered a foster brother to the future king.

[5] Chao's connection, if any, with the then-reigning Sukhothai dynasty of the Ayutthaya Kingdom is unclear, with some speculating her to be a daughter King Ekathotsarot.

Pan set out for France in 1686 on two French ships with two other Siamese ambassadors, Ok-luang Kanlaya Ratchamaitri and Ok-khun Si Wisan Wacha,[10] and by the Jesuit Father Guy Tachard.

The naturalist noted "pictures of the Royal family of France and European maps" hanging "in the hall of his [Pan's] house":[15] "He is a more comely Person, and of better aspect, than I ever met amongst this black race of mankind...

He is also quick of understanding and lively action, for which reasons he was a few years ago sent Ambassador to France, of which Country, its Government, Fortresses and the like, he would often entertain us in his discourses; and the hall of his House, where we had a private audience of him, was hung with the pictures of the Royal Family of France, and European Maps, the rest of his furniture being nothing but Dust and Cobwebs.In 1699, Pan and Phetracha received a visit from the Jesuit Father Guy Tachard.