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Czechoslovak Genealogical Society International (CGSI) is the leader in providing educational, cultural, historical, and genealogical resources, with a special emphasis in providing opportunities for our members to research and discover their heritage.
Research and connect with families from the Czech and Slovak ancestral lands. CGSI focuses on the areas of the present-day Czech Republic and Slovakia. This includes Czech (Bohemian), German-Bohemian (Böhmisch), Hungarian, Jewish, Moravian, Rusyn (Ruthenian), Silesian, and Slovak ancestry.