Belgium
来自Big Physics
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wiktionary
Borrowed from Latin Belgium, from the name of the tribe of Belgae.
etymonline
Belgium
c. 1600, "Low Germany and the Netherlands," from the Latin name of the territory occupied by the Belgæ, a Celtic or Celto-Germanic tribe that in Roman times occupied the area below the mouth of the Rhine, including modern Belgium and much of northeastern France. Adopted 1830 as the name of a new nation formed from the southern part of the former United Kingdom of the Netherlands.
