Sprevjane
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The Sprevjane (Slavonic name) or Sprewanen (German) name were a Slavic tribe who lived around the river Spree, where Berlin is now, in the Brandenburg area of eastern Germany. They were first recorded in 948 and again in 965 as living in the territory of the Holy Roman Empire under Otto I. Archaeological finds point to them coming to the area in the 8th century, and by 825 they started to build a settlement in today's Köpenick, a district of Berlin.
Their name is from "Sprevja" (the local Slavonic form of the river name Spree) plus the common Slavonic ethnic suffix -ane. The Germanized form, Spreewanen, may have been influenced by the German verb wohnen (in Old High German, wonen), meaning "to dwell".