Kosa Pan

Pan (Thai: ปาน) was a Siamese diplomat and minister who led the Second Siamese Embassy to France sent by King Narai in 1686. He was preceded to France by the First Siamese Embassy to France, which had been composed of two Siamese ambassadors and Father Bénigne Vachet, who had left Siam for France on January 5, 1684. He was a nephew of King Ekathotsarot and a great grandfather of King Phutthayotfa Chulalok, the founder of the Chakri Dynasty. His brother, Lek (เหล็ก), also held the post of foreign minister before him.

Pan was his given name. In formal language, he is usually called by his noble title Chao Phraya Kosathibodi (เจ้าพระยาโกษาธิบดี; "Lord Minister of World Affairs"), the title for the minister of foreign affairs. He is also referred to by his former title Ok Phra Wisut Sunthon (ออกพระวิสุทธิสุนทร; "Count of Pure Amity"), the title for a first-class diplomat.

In informal language, Pan is usually called Kosa Pan (โกษาปาน; "Foreign Minister Pan").

Due to his successful diplomatic efforts, he also gained the nickname "Honey-tongued Diplomat" (ราชทูตลิ้นทอง Ratcha Thut Lin Thong or นักการทูตลิ้นทอง Nak Kan Thut Lin Thong; both literally mean "Golden-tongue Diplomat"). In Thai language, lin thong (ลิ้นทอง; "golden-tongue") means good at speaking or negotiating.

Pan set out for France in 1686, accompanying the return of the 1685 French embassy to Siam of Chevalier de Chaumont and François-Timoléon de Choisy on two French ships. The embassy was bringing a proposal for an eternal alliance between France and Siam. It stayed in France from June 1686 to March 1687. Pan was accompanied by two other Siamese ambassadors, Ok-luang Kanlaya Ratchamaitri and Ok-khun Sisawan Wacha, and by the Jesuit Father Guy Tachard.

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