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Welcome...

The Jewish Genealogical Society (JGS) of Colorado is a leader in education, research, information exchange forums, and resources for Jewish genealogy.

Founded in 1995 by Miriam Ohr (z''l) and Sandra Greenberg, and as part of a network of 70 societies worldwide within the International Association of Jewish Genealogical Societies (IAJGS), the Society is a nonprofit and run 100% by volunteers. 

Learn More...

Are you interested in researching Jewish family history and looking for a local network of experts and enthusiasts?

JOIN US

We’re here to help by providing programs, support, and guidance to find and use resources located in Colorado and throughout the world. Please take a look through our website.

We encourage all levels of research from beginner to advanced to participate and share their knowledge. Take a look at the How to Get Started page where you’ll find useful information for all levels of research, and check out upcoming programs. Guests are always welcome. We meet once a month on Zoom on Sunday mornings. To help folks with their research questions, we start at 9:30 am and the guest speaker starts at 10 am, (Mountain Time) from September through June.

JGSCO is a nonprofit organization run entirely by volunteers. Annual dues of $30 per individual or $40 per household support the administration of the group including speaker and venue fees, website, and operations. Join here.

Join us at our Annual event

Bennett Greenspan


 UNLOCK DEEPER INSIGHTS BEYOND OTHER DNA TESTS


Bennett Greenspan

with Bennett Greenspan

Founder of Family Tree DNA
Hosted by the Jewish Genealogical Society of Colorado (JGSCO)

 Sunday, September 7, 2025

 Wolf Theater at the JCC in Denver
350 S. Dahlia St, Denver, CO 80246
 Registration at 9:30 AM | Program begins promptly at 10:00 AM
 We promise to get you out before the Broncos game!

 Featured Presentations:

10:00 AM
 Chromosomal Time Machine:
How I Traced My Genealogy Back to 150 CE
Using Y-DNA

11:15 AM
 The mtDNA of the Jewish People
and What’s New with Family Tree DNA’s MitoTree

12:15 PM
 Lunch (Included with In-Person Registration)
Cohen Cuisine

1:15 PM
 Ask Bennett Anything
Bring your DNA questions!

 Pricing:

Ticket Type Member Non-Member
In-Person $25 $35
Zoom (Same Program) $25 $35

✅ In-person registration includes continental breakfast and lunch.

 Register now: https://jgsco.org/event-6162071
 Zoom link included in registration and reminder emails.

 Why Y-DNA Testing Matters

Bennett’s opening talk highlights Y-DNA’s role in tracing male lineage back through time.
If you're preparing for this event, we strongly recommend testing your family's Y-DNA — especially if you want to preserve paternal lineage data that may otherwise be lost.

For example:

"I'm female and don’t carry Y-DNA. My father was an only child, and much of his paternal family died in the Holocaust. If my nephew never has a son, this Y-DNA line disappears. Testing now preserves our legacy."

 What to test:
Bennett recommends:

  • Paternal Ancestry Kit – $119

  • Paternal Ancestry in Greater Detail – $449
    Check familytreedna.com for current discounts!

‍  About Bennett Greenspan

Entrepreneur and lifelong genealogy enthusiast, Bennett Greenspan is the founder of Family Tree DNA — the first company to offer direct-to-consumer DNA testing for genealogy.

He launched the Y-DNA test in 2000, sparking the genetic genealogy revolution.

  • Born in Omaha, NE (1952)

  • University of Texas, Government Department (Class of 1974)

  • Recently celebrated 40 years of marriage

  • Proud father of two and new grandfather!

 Sponsored by

Marcia Levy & Ellen Beller

We look forward to seeing you in person or on Zoom!



EVENTS, NEWS & UPDATES

Upcoming events

WEBSITE UPDATES

Members can login by clicking the Login button (upper right of the page). Don't know your password? Go to the login page and click the Forgot Password link.

There is an app for this site! To load the app, access this website from your mobile device and click the appropriate icon for the Wild Apricot Member app:

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Apple iOS or iPadOS:

Need Help Getting Started?

The Jewish Genealogy Society of Colorado offers a Q & A session during monthly meetings.  Come 30 minutes early where we discuss and offer suggestions to your genealogy questions. We have found this is a great way to help enthusiats work through their 'brick walls.' 

Some of our members may also offer private research services. Fees and type of research should be negotiated individually. Results may vary and are not guaranteed, nor does the JGS of Colorado recommend or sponsor any individual researcher.

JOIN us

The Jewish Genealogical Society (JGS) of Colorado is a leader in education, research, information exchange forums, and resources for Jewish genealogy.

Mailing Address

Jewish Genealogical Society of Colorado
945 S. Birch St.
P.O. Box 460442
Denver, Colorado 80246

Email: info@jgsco.org

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© 2025 Jewish Genealogical Society of Colorado

JGSCO is a 501(c)3 non-profit organization.