[["Thailand last became the country's official name  in 1949.  The change first occurred in 1939, but had briefly reverted back to Siam at the end of World War 2 in 1945.  The word Thai refers to the country's largest ethnic group.", 548.0], ["Siam became Thailand in 1939", 209.0], ["The name was officially changed from Siam to Thailand on June 24, 1939.", 96.0], ["new york", 0.0]]
when did siam become thailand
history,thailand,vietnam