After the revolution in 1932, Korn Chaturachinda, the owner of local shophouses and market, changed its name to "Si Yan" which means "auspicious quarter" for good fortune.

[2] Si Yan intersection is where Samsen (which runs along Chao Phraya River from the north end of Bang Lamphu) cuts across Nakhon Chai Si Roads (which runs in a directly east–west) from Rama VI Road in neighbouring Phaya Thai District up until end at Payap pier on Chao Phraya River.

Payap used to be the residence of Prince Dilok Nopparat, the son of King Chulalongkorn (Rama V) who was born from the Royal Concubine Thipkesorn, who were descended from the Chet Ton Dynasty.

The Payap pier was therefore used as a place where members of the Chet Ton Dynasty came to visit him in Bangkok by boat.

[4] Ban Payap, European style two-story white house is located on the northwest corner of the intersection.