FamilyTreeDNA’s Y-DNA Haplotree: 90,000 Branches and Counting
FamilyTreeDNA’s Y-DNA haplotree is the largest of its kind, with over 90,000 branches and 750,000 variants. This overview outlines its structure, scientific value, and current scope as of April 2025.
The World’s Largest Y-DNA Haplotree
FamilyTreeDNA maintains the largest Y-DNA haplotree in the world — a growing record of paternal ancestry. Each month, we update this post with the latest stats, insights, and tools to help you explore your place in history.
Understanding Y-DNA Haplogroups in Family Finder™ Results
Learn how Family Finder uses SNPs to assign Y-DNA haplogroups, what they mean for your paternal ancestry, and how to refine results with tools like Discover™ and Big Y-700.
Why Did My Y-DNA Haplogroup Change?
Wondering why your haplogroup changed? Learn how new discoveries and test methods can impact your Y-DNA haplogroup assignment.
Interpreting Y-DNA Test Results: Y-DNA Matches
Learn how to interpret your Y-DNA test results, explore Y-DNA matches, genetic distances, and how to use them to trace your paternal ancestry.
Introducing the Match Time Tree, the Latest Discover™ Genealogy Report
Learn about the new Match Time Tree report in Discover™ for FamilyTreeDNA Big Y-700 customers.
Interpreting Y-DNA Test Results: Y-DNA Haplogroups
Learn how Y-DNA haplogroups can be used to trace your paternal lineage, revealing your migration paths and ancestral origins.
Y-DNA Sheds New Light on the Medieval Genealogies of the Uí Briúin Dynasty of Northwest Ireland, Part 2
Continue learning how Y-DNA shed new light on the medieval genealogies of the Uí Briúin dynasty of northwest Ireland.
Are You Researching the Right Surname?
Wondering if you're researching the right surname? Dive into how autosomal and Y-DNA testing and genealogy records can confirm your family history and uncover ancestral origins.
Introducing the Discover™ Classic Tree for Y-DNA
Learn about the Discover Classic Haplotree for Y-DNA, the newest tree from FamilyTreeDNA.