HeyJaredThe Jewish Genetic Discovery Foundation
The official Substack of the Jewish Genetic Discovery Foundation
- Indexed issues, last 90 days
- 5
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- Sep 16, 2026
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- Jul 4, 2026
Latest issues
Sephardic Echoes in Colonial America (opens the original)
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A New ResultOne of the joys of doing the work that we do is the feeling of fresh discovery each time a new result comes in. Every new test is a blessing in its own way. Some results update the phylogenetic tree in ways that we expect, but they nevertheless refine the date, tying in branching events with the known (or suspected) history. Sometimes, we get a better understanding of what we know, such as how widespread a certain uniparental (Y-DNA or mitochondrial DNA) lineage is within a designate
Between Two Caucasian Fortresses (opens the original)
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The Caucasus region has long been both a shatterbelt compressed between major Eurasian powers and a place of refuge for religious and ethnic minorities. This rugged landscape, with mountains stretching over 700 miles (1,100 km), from the Caspian to the Black Seas, was home to two historic Jewish communities: Georgian Jews (Kartveli Ebraelebi) residing in the south-western part of the Caucasus and Mountain Jews (Juhuro) in the eastern and north-eastern part. Scholars remain divide
An Alcabas By Any Other Name (opens the original)
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<img alt="Image" class="sizing-normal" height="1280" src="https://substackcdn.com/image/fetch/$s_!28wW!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F18913522-f692-47e1-b7dc-41f16b5b37b3_892x12
Mapping the Mizrahi Jewish world’s largest family tree (opens the original)
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Back in January, we told you about a Bukharian Jewish tester whose deep Y chromosome sequence turned out to be the closest-known Mizrahi cousin to a medieval Ashkenazi sub-branch, R-FGC13211. That result sits inside a much larger pedigree: R-FT1713. This is, by a wide margin, the single most common Y-DNA lineage among Mizrahi Jews. Its carriers span Jewish communities from Iran, Afghanistan and Central Asia to Iraq, Syria, the North Caucasus and Georgia, as well as India and Yemen,
The Massias Family (opens the original)
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<img alt="" class="sizing-normal" height="970" src="https://substackcdn.com/image/fetch/$s_!e1mB!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fd70af2b5-82d1-4097-87d4-5ceb98ca408e_2528x1684.pn
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