"a gypsy of society," 1848, from Fr.
bohemién (1559), from the country name, from M.Fr.
Boheme "Bohemia," from L.
Boiohaemum (Tacitus), from
Boii, the Celtic people who settled in what is now Bohemia (and were driven from it by the Gmc. Marcomans early 1c.). The modern sense is perhaps from the use of this country name since 15c. in Fr. for "gypsy" (they were believed falsely to have come from there, though their first appearance in W.Europe may have been from there), or from association with Bohemian heretics. It was popularized by Henri Murger's 1845 story collection
"Scenes de la Vie de Boheme," the basis of Puccini's
"La Bohème." Used in Eng. 1848 in Thackary's "Vanity Fair."
"The term 'Bohemian' has come to be very commonly accepted in our day as the description of a certain kind of literary gipsey, no matter in what language he speaks, or what city he inhabits .... A Bohemian is simply an artist or littérateur who, consciously or unconsciously, secedes from conventionality in life and in art." ["Westminster Review," 1862]