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Which Southeast Asian country was formerly known as Siam?

By Duc Tran   October 15, 2026 | 02:32 am PT Google Get VnExpress first in Google Search info See more of the news you trust. Make VnExpress a preferred source to prioritise our updates in your Google search results
Answer: Thailand

Siam was the former name of present-day Thailand. The country officially changed its name from Siam to Thailand in 1939, according to a Library of Congress publication.

After World War II, it briefly reverted to the name Siam in 1945 before officially adopting Thailand again in 1949.

The name Thailand is commonly interpreted as meaning "land of the free."

Can you think of another way to explain it?

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