Its name comes from the arrival of three ambassadors led by Kosa Pan, sent by the King of Siam on the 29 June 1686 to meet Louis XIV in Versailles.
They went with six mandarins, three translators, two secretaries and a retinue of servants, loaded with presents.
The rue de Siam is quoted by Jacques Prévert in his poem Barbara.
Soi Charoen Krung 36 Alley, the location of French Embassy in Bangkok, was renamed in 2013 to "Rue de Brest" to commemorate diplomatic relations, reciprocating Rue de Siam.
Midshipmen and officers from all nationalities used to have an aperitif at l’Épée and then, cross the rue de Siam to have supper at Les Antilles.