Chechens
Chechens (; '; Old Chechen: Нахчой "Naxçoy") are a Northeast Caucasian ethnic group of the Nakh peoples originating in the North Caucasus region of Eastern Europe. They refer to themselves as Vainakhs (which means "our people" in Chechen) or Nokhchiy (pronounced ; singular Nokhchi, Nakhchuo or Nakhtche). Chechen and Ingush peoples are collectively known as the Vainakh. The majority of Chechens today live in the Chechen Republic, a subdivision of the Russian Federation.
Bohemian
It was not until the 19th century that other European languages began to use words related to "Czechs" (as in English, "Tschechien" in German, "Tchèques" in French) in a deliberate (and successful) attempt to distinguish between ethnic Slavic-speaking Bohemians and other inhabitants of Bohemia. The latter were mostly ethnic Germans, who identified as "German Bohemians" ("Deutschböhmen") or simply as "Bohemians" ("Böhmen"). In many parts of Europe, state citizenship was not identical with ethnicity and language, and the various peoples were usually identified by their language. Ethnic boundaries in Bohemia were not always sharp, and people very often were bilingual. Intermarriages across language borders were also common. Native Czech speakers often spoke German and many native German speakers spoke Czech with varying fluency, particularly in areas with many Czech speakers.