Jackson Family Genealogy
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Jackson Clan DNA Project
by John R. McAnally
No longer should the descendants of Robert Jackson refer to themselves as Hempstead Jacksons, but more precisely by the technical term haplogroup I-Y9349. Their branch of this Jackson clan is larger than the place name implies. 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 four or five patriarchs.
I- Y9349: Robert Jackson b. England 1615/20 d. 1683 Queens Co. New York and Samuel Jackson b. 1757 England 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.
I-BY19809 : The second branch formed by Samuel Jackson b. abt 1750 d. 1722 Stafford Co., Virginia and John Lynn b. abt 1730 Stafford Co., Virginia d. 1794 Fauquier Co., Virginia is still in a state of analysis. If the time to the most recent common ancestor proves to be 500 years before present then our conjecture that John Lynn is/was a direct male descendant of Samuel Jackson of Stafford Virginia will be wrong. Regardless, this match has established a second branch of our Jackson clan that is distinct from the haplogroup I-Y9349.
I-M223: Big Y testing is now in progress for Graham Jackson of Australia, which will take approximately 3 months to complete including the analysis at Yfull that has to be done after FTDNA has the Big Y results. Graham was negative for the SNP test of I-Y9249 and I-BY19809 which means his progenitor forms our third branch. 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. 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.
Of the 44 Jackson men participants in the Jackson Surname Project at FTDNA ten 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 in.
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