Etymology

Hainan

Hai·nan
H4A1I1N1A1N1

Today it means: A province off the coast of southern China, primarily made up of Hainan Island. Capital: Haikou. Full definition →

Mandarin 海南
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The story

  1. Mandarin · borrowed from海南
  2. English todayHainan

c. 1600s, from Mandarin 海南 (Hǎinán). Doublet of Hainam and Hailam.

Etymology from Wiktionary, CC BY-SA 4.0.