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.

Pocket watch and photograph
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.

CGSI conference attendees at a table

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

CGSI Bylaw Amendment proposed for Annual Membership Meeting on October 24, 2020.
Slate of Candidates for Office 2021-2023 announced for Annual Membership Meeting election on October 24, 2020.
The CGSI Research Collection is now open for visitors on Thursdays from 4 pm to 8 pm and Saturdays from 10 am to 4 pm (CDT).

Global Slovakia Presents "Exploring Jewish Slovakia" (Webinar)

Join Global Slovakia for this free webinar and discover the deep roots of Jewish heritage in the heart of Europe with special guest Rabbi Baruch Myers, Chief Rabbi of Slovakia's capital city, Bratislava.

Slovenská Vilija (Slovak Christmas Eve) Dinner

Annual Slovenská Vilija (Slovak Christmas Eve) Dinner in Cleveland, Ohio served as a take-out dinner this year.

DAHA & BBLA Present "Czech Holiday Party" (Online Event)

Watch online a holiday sing-along and a film about the making and presentation of the American premiere of Georgius Zrunek's festive 18th century tri-lingual Christmas Mass.
Charles Bridge in Prague