The Czech Republic's official long and short names at the United Nations are Česká republika and Česko in Czech, and the Czech Republic and Czechia in English.[1] All these names derive from the name of the Czechs, the West Slavic ethnolinguistic group native to the Czech Republic. Czechia (/ˈtʃɛkiə/), the official English short name specified by the Czech government, is used by many international organisations.
Attested as early as 1841,[2] then, for example in 1856[3] or 1866,[4] the word Czechia and the forms derived from it are always used by the authors synonymously with the territory of Bohemia (Kingdom of Bohemia at that time).[5]
The Czech name Čechy is from the same root but means Bohemia, the westernmost and largest historical region of modern Czechia. The name Bohemia is an exonym derived from the Boii, a Celtic tribe inhabiting the area before the early Slavs arrived. The Lands of the Bohemian Crown (1348–1918) were part of the Holy Roman Empire; often called "the Czech lands", they sometimes extended further, to all of Silesia, Lusatia, and various smaller territories. The Czech adjective český means both "Czech" and "Bohemian".
^Boháč, Pavel; Kolář, Jaroslav (1993). Jména států a jejich územních částí [Names of states and their territorial parts] (in Czech). Praha: Český úřad zeměměřický a katastrální. ISBN978-8-08691-857-0.