สยาม

Etymology 1
Possibly from (whence Modern, , , ), becoming. And later, the spelling was meant to imitate which did not relate at all.

Officially used as the name of the country from the reign of (1851–68) until 24 June 1939, when the country was renamed.

Proper noun

 * 1)  (ประเทศ~, ~ประเทศ, ~รัฐ, ราชอาณาจักร~)

Etymology 2
From.