A Bohemian (/boʊˈhiːmiən/) is a resident of Bohemia, a region of the Czech Republic or the former Kingdom of Bohemia, a region of the former Crown of Bohemia (lands of the Bohemian Crown). In English, the word "Bohemian" was used to denote the Czech people as well as the Czech language before the word "Czech" became prevalent in the early 20th century.
In a separate meaning, "Bohemian" may also denote "a socially unconventional person, especially one who is involved in the arts" according to Oxford Dictionaries Online. (See Bohemianism).
The name "Bohemia" derives from the name of the Boii, a Celtic tribe who inhabited that area towards the later La Tène period. The toponym Boiohaemum, first attested by Tacitus, is commonly taken to mean "home of the Boii" (from the Germanic root *haima- meaning "world, home"). The word "Bohemian" has never been widely used by the local Czech population. In Czech, the region since the early Middle Ages has been called Čechy but also, especially during the period of restoration/emancipation of the Czech language and nation, as Čechie. Another term, stressing the importance of the state/nation, is Království české ("Czech Kingdom") in Czech, or Böhmen (Königreich) in German. Its mainly Czech-speaking inhabitants were called Čechové (in modern Czech Češi).