For Person A, the sequence is: Parent, Grandparent, Great-Grandparent, and finally the Shared Ancestor. 5% (700 cM) Second Cousin Great-Grandparents 3.
3rd Cousins Family Migration Patterns and What They Mean for Your Connection
Defining the Third Cousin At its core, a 3rd cousin relationship is defined by the shared ancestor couple from whom both individuals descend. Conversely, in smaller family groups or populations with high rates of migration, individuals may never meet their third cousins.
You share a higher percentage of DNA with a second cousin, who descends from a shared set of great-grandparents. This overlap is often sufficient for modern DNA tests to identify the relationship, though it falls below the threshold for close family matches.
3rd Cousins Family Migration Patterns and Shared Ancestors
This genetic proximity explains why you likely do not share daily life or family traditions, despite the mathematical certainty of the connection. The relationship exists more as a genealogical fact than a social one.
More About 3Rd cousins explained
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More perspective on 3Rd cousins explained can make the topic easier to follow by connecting earlier points with a few simple takeaways.
