Jackson Family Genealogy
Table of Contents
Jackson Clan DNA Project
Updated 24 July 2021
This Jackson clan is larger than the place name (Hempstead)
implies. New testing techniques have provided means whereby we
can cheaply determine your patriarch and which branch of this
patriline 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 or
I-Y38787. All this comes from the recent advancement in YDNA
testing called the Big Y, a change from the original maximum of
111 marker STR (short tandem repeat) test to a combination of
700 marker STRs plus approximately 70,000 of the SNP (single
nucleotide polymorphism) test.
(But those I-Y numbers are not handily remembered so for
call this whole Clan 'Hempstead' for lack of a better name.)
by John R. McAnally
Presently there are three branches and one subgroup of this
clan that are defined by five patriarchs. To get a picture of
the structure, size and interrelationships go to
Notice the downstream time locations starting with the progenitor
haplogroup I-Y8950 then in sequence to subgroups I-Y9389 and I-BY19809. YFull analysis indicates that TMRCA
between I-Y8950 and I-Y9389 is 350 years before present and
another 500 years before present to I-BY19809.
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 closely 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.
I-Y38787:This subgroup of I-Y9389 has the patriarch of General Joseph Jackson, the great-grandson of 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 largest group of
participants tested. 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.
BY-19809: The third 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 third
branch of our Jackson clan that is distinct from the haplogroup
I-Y8950 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. 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 54 Jackson men of our clan out of nearly 700 total
YDNA participants in the Jackson Surname Project at FTDNA.
Five have not been able to establish a connection to any of the
five patriarchs nor have extended their pedigree further back
in time to be so named, ie having found their patriarch. These
men could be descendants of the established branches or anyone
of them might be a separate branch. The
recent Big Y testing and subsequent SNP testing can now be used
to test which branch they belong to.
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 Family
Finder results merged in. Thanks for your patience! Remember
this is all volunteer work by people who care!
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.
Table of Contents
Copyright 2017-2021, all rights reserved by John R. McAnally.
You are welcome to use any of this information for your personal
use, but it may not be copied, uploaded on any web site without
proper acknowledgement.. This page by John R.
McAnally was updated October 2017, February 2020, and July
2021 as new information is learned.