SIAM

Pre-1939 name for Thailand (4)

Solution has appeared in 2 crosswords (1 across and 1 down):

• Quick crossword No 16,609 — 2023-07-30 23:00:20
  16A: Thailand once (4)
• Quick crossword No 16,226 — 2022-05-09 23:00:21
  22D: Pre-1939 name for Thailand (4)