Introductory Y-DNA Analysis

Here we introduce the facts, assumptions and postulations that are learned or derived from the study and analysis of STURDEVANT Y-DNA. Collectively, this is what we know about the STURDEVANTs.

  • We are certain that tested STURDEVANTS descend from at least two branches of the human genetic tree: haplogroup I and haplogroup R. While there is only one known lineage of haplogroup I (I-L22), there are two known lineages of haplogroup R (R-M269 and R-M512). Combined, these lineages indicate that there are at least three STURDEVANT progenitors.
  • There are other genetically similar persons with similar Y-DNA but a different surname. Somewhere upstream, in pre-genealogical times (approximately 15 generations), they had a genetically similar father in their paternal lineage. We currently know of about 15 surnames in this category. This may have occurred before genealogical times or they may be men who changed surnames for any of several reasons (e.g., judicial decree, convenience, before paternal surnames, etc.).
  • Conversely, there are genetically dissimilar persons who have a STURDEVANT surname but do not have similar Y-DNA. These men were likely adopted (formally, legally, or not) STURDEVANTs that assumed the surname of their adoptive parents.
  • Members of both haplogroups migrated to The New World.
    • Haplogroup I is represented mainly by the SturDEvant spelling.
      • Five members with the DE spelling identify with haplogroup I1-L22 (one member tested; four members inferred).
      • Genealogical evidence provides that these persons descend from William Sturdevant of Norwalk, Connecticut Colony.
      • This group probably migrated from Northern Europe, possibly Ireland, Scotland, Scandinavia or even the Baltic region.
    • Haplogroup R is represented by SturTEvant/SturTIvant/SturDIvant spellings. But spelling correlations are not well defined.
      • Five members are predicted in the R-M269 clade.
      • Genealogical evidence provides that these persons descend from Samuel Sturtevant of Massachusetts Colony.
      • One member is predicted to be in the R-M512 clade. Genealogical evidence provides that this person descends from Richard Sturdevant of Vermont.
      • This group probably migrated from the geographic region of the British Isles since this is the most prevalent clade at that location.

Discussion continues at the following pages relevant to each major STURDEVANT lineage:


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