Vítáme Vás! (We welcome you!)

Research and connect with families from the Czech and Slovak ancestral lands.

CGSI focuses on the areas of present-day Czech Republic and Slovakia. This includes Czech (Bohemian), German-Bohemian (Böhmisch), Hungarian, Jewish, Moravian, Rusyn (Ruthenian), Silesian, and Slovak ancestry.

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Czechoslovak Genealogical Society International (CGSI) is a member-based organization.

We are dedicated to genealogical research and interest in descendants of ethnic groups with roots from the Czech and Slovak ancestral lands of Central Europe.

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What Members Say

Because of CGSI, in six months I went from knowing nothing about my Czech ancestors to learning I had relatives who were serfs on the Litomyšl estate.
JoAnn P., Cadott, Wisconsin, USA

News & Events

Please join CGSI at 10 AM CDT on Saturday, May 22, 2021 to learn more about what happened after the Communists came to power and how families and cultures were divided.
MGC is now open to all members and visitors, with limited hours, on Thursdays from 4pm to 8pm and Saturdays from 10am to 4pm (CST).
Join us for CGSI's first quarterly program of 2021, and learn about three giants of Czech and Slovak architecture around the world.

Global Slovakia Presents "Sealed in Stone" (webinar)

Global Slovakia's webinar "Sealed in Stone" explores the mysteries and histories of 4 breathtakingly beautiful Slovak castles.

NGS 2021 Family History Conference (Online event)

NGS 2021 Family History Conference is an online virtual event this year

NGS SLAM! Idea Showcase (Online event)

The SLAM! Idea Showcase is a new component of the week-long virtual NGS Family History Conference. The showcase will highlight creative and innovative projects or programs by societies, libraries, archives, and museums (SLAMs).
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