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.
Czechs
The Czech ethnic group is part of the West Slavic subgroup of the larger Slavic ethno-linguistical group. The West Slavs have their origin in early Slavic tribes which settled in Central Europe after East Germanic tribes had left this area during the migration period. The West Slavic tribe of Bohemians settled in the area of Bohemia during the migration period, and assimilated the remaining Celtic and Germanic populations. They formed a principality in the 9th century, the Duchy of Bohemia, under the Přemyslid dynasty which was part of the Great Moravia under Svatopluk I. According to mythology, the founding father of the Czech people were Forefather Čech, who according to legend brought the tribe of Czechs into its land.