c. 1600, originally in Scottish (Swethin, Swadne, etc.), from Middle Dutch Sweden, probably a dative plural of Swede (earlier in English Sweden was used of the people and until 17c. Swedeland was the English name of the country). In Old English, the country was Sweoland or Sweorice (compare Old Norse sviariki, source of Swedish Sverige). Ultimately named for the original inhabitants (see Swede).

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Definitions of Sweden from WordNet

Sweden (n.)
a Scandinavian kingdom in the eastern part of the Scandinavian Peninsula;
Synonyms: Kingdom of Sweden / Sverige