Jackson Family Genealogy
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Jackson Clan DNA Project
Updated 8 February 2020
by John R. McAnally
This Jackson clan is larger than the place name (Hempstead)
implies. New testing techniques have provided means where
by we can cheaply determine your patriarch and which branch of
this clan that you belong to. No longer should the descendants
of Robert Jackson refer to themselves as Hempstead Jacksons, but
more precisely by the technical term haplogroup I-Y9389.*
All this comes from the recent advancement in YDNA testing
called the Big Y, a change from the original STR (short tandem
repeat) test to the SNP (single nucleotide polymorphism) type of
test. A direct male descendant of each patriarch, those
being Robert Jackson of Hempstead and Samuel Jackson of
Pennsylvania, took the Big Y test and found that they have a MRCA
(most recent common ancestor) 500 years before present - or
better to say they have a common ancestor in about the time that
the English were first establishing surnames.
Presently there are three branches of this clan that are defined by five patriarchs.
I-Y9389: Robert Jackson b. England 1615/20 d. 1683 Queens Co. New York and Samuel Jackson b. 1757 Ireland d. 1834 Greene Co., Pennsylvania combining to make the first. By that we mean that a direct male descendant of each patriarch has done the Big Y test and it has shown that these two men are a match that indicates they have a common ancestor in the 1500s. Any male Jackson that conjectures that he is a direct male descendant of these patriarchs but cannot prove such via standard genealogical proofs can prove such via this SNP test at FTDNA at the cost of $39 or at SEQ at the cost of $18.
I-BY19809: The second branch formed by Samuel Jackson b. abt 1650 d. 1722 Stafford Co., Virginia and John Lynn b. abt 1730 Stafford Co., Virginia d. 1794 Fauquier Co., Virginia has determined their MRCA as 150 years before present which implies that they have a common ancestor in the named Samuel Jackson, thereby meaning John Lynn was a direct male descendant of Samuel Jackson. Regardless, this match has established a second branch of our Jackson clan that is distinct from the haplogroup I-Y9389. Any male Jackson that conjectures that he is a direct male descendant of either of these patriarchs, but cannot prove such via standard genealogical proofs can prove such via this SNP test at YSEQ at a cost of $18. FTDNA has as yet not established a test for BY19809.
I-Y8950: Graham Jackson of Australia, is a descendant of Thomas Jackson b. abt 1797 d. abt 1860 of Ireland. Graham was negative for the SNP test of I-Y9349 and I-BY19809 which means his progenitor forms our third Jackson clan branch. He has taken the Big Y test but does not have a match and therefore does not at this time have a terminal SNP determined. He is classified in the haplogroup I-M223 as I-Y8950 but this is not terminal and therefore cannot be used to determine a close relationship. If someone took an SNP test for I-Y8950 and matched Graham this would imply only that they are in a large haplogroup classification but not necessarily related. A similar situation as two individuals being in the large haplogroup I-M223. At FTDNA posting the haplogroup in green implies that the person has been proven via testing to be in that group and those in red are just predictions from an analysis of the STR results.
Of the five patriarchs only one, that of Thomas Jackson (b. abt 1797 Ireland d. aft 1873 Ireland) has records of a marriage and births of children that can provide a point of reference so that further research in Ireland/UK can be done. The other patriarchs records end within the United States or with only family lore conjectures to the old country.
There are 53 Jackson men of our clan out of nearly 700 total YDNA participants in the Jackson Surname Project at FTDNA. Four have not been able to establish a connection to any of the four patriarchs nor have extended their pedigree further back in time to be so named, ie having found the original immigrant. These men could be descendants of the established branches or anyone of them might be a completely separate fourth branch. The recent Big Y testing and subsequent SNP testing can now be used to test which branch they belong to. We have lost contact with three of the individuals but the fourth Terrance Levett could be a separate Jackson lineage. His upgrade to 67 markers is in progress. He has already tested negative to both I-BY19809 and I-9389 so if his upgrade still matches our haplotype then he could well be our fourth branch.
See https://www.familytreedna.com/groups/jackson/about/results for Member Contributed Lineages grouped according to the members' tested results. It has been a BIG job getting the FamilyFinder results merged in. Thanks for your patience! Remember this is all volunteer work by people who care!
*We are continuing to call this whole Clan 'Hempstead' at FTDNA for lack of a better name. That 'I-Y9389' is not handily remembered.This google spreadsheet was prepared to help you visualize the relationships and connections of the Hempstead Clan descendants who have participated in DNA testing. If you see that there are folks missing from this s/s, please let Janie know.
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