Etymology
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Bosnia 
named for the River Bosna, which is perhaps from an Indo-European root *bhog- "current." As a name or adjective for someone there, Bosniac (1756, from Russian Bosnyak) is older in English than Bosnian (1788).
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Sarajevo 
capital of Bosnia, founded 15c. and named in Turkish as Bosna-Saray, "Palace on the (River) Bosna," from saray (see caravanserai); the modern name is a Slavic adjectival form of saray.
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