Grigsby Surname: Y-DNA Haplogroup
Published genetics research or a documented case study links the surname Grigsby to a specific Y-DNA paternal-line haplogroup.
FGC48457
Clade R1b (R-U198 subclade)
Also spelled: Grigsbee, Grigsbie
All 48 tested American male-line descendants of "Immigrant" John Grigsby (1623-1730) of Stafford County, Virginia carry the novel SNP FGC48457 within Haplogroup R-U198. Several non-Grigsby surname families (Chambless, White, Lay) were shown to descend from the same lineage via documented surname changes, while the 11 UK-based Grigsby testers fell into five unrelated haplogroups with no shared ancestor with the American line in a genealogical timeframe.
Source: Grigsby DL, Grigsby MW, Johnson M. "Genetic Genealogy Study: The Grigsby Family - Uncovering Patrilineal Descendants Through Y-DNA Analysis." Journal of Genetic Genealogy 12(1), 2024.
How to read this. A surname match means some people with that surname, in a specific study or family record, were found to share a haplogroup, most likely due to a shared patrilineal ancestor generations back. It is not proof that you personally carry that haplogroup: surnames change through adoption, remarriage, non-paternity events, and independent origin of the same name in different families. For your own confirmed haplogroup, test your DNA with our HaploAI Y-DNA/mtDNA predictor.
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