The ancestral haplotype of Colonel John Jackson, a son of Robert
Jackson has been deduced by the comparison of two of his direct
male descendants. This means that if by some means we could
obtain a sample of Colonel John Jackson's Y-DNA, his marker set
would match 67/67 to those of his two descendants alive today. In 11 generations from John Jackson down the two separate lines
there has not been one mutation, so in total 22 generations have
transpired unchanged. One would think we could say the same
about Robert Jackson but in every generation there is a
possibility for a mutation, so John's father could possibly have
a different haplotype. Many of the rest of John's descendants
have had mutations occur in those 10-12 generations and their
relationship to him has been determined by a combination of
genealogy and their relationships to those individuals that have
the ancestral haplotype.
The most recent common male ancestor of all humans alive today
is called Y-Adam. He was one particular individual that lived
maybe 60,000 years ago but he was not the only living male at
the time. Through the ages all the rest of the males living at
that same time had their descendants either daughtered out or
died out. Y-Adam's Y-DNA has mutated during the ages and because
of migrations and various environmental events, the Y-DNA can now
be used to identify various major ethnic or geographical groups. The Chromosome Phylogenetic Tree is the listing of those various
haplogroups. The Hempstead Jackson lineage belongs to haplogroup
I1b2a-Cont3 and this implies that the deep history of this line
goes back to the geographic area of northern Europe, possibly
Scandinavia (Viking), Scotland, and Ireland.
In Europe the R1b is the major haplogroup. A twelve marker Y-DNA test for
individuals in this group most generally turns up hundreds of
related matches. A 37 marker test is almost a requirement for
them to find a true relationship. The Hempstead lineage being in
the I1b2a-Cont3 haplogroup has the distinction of having a very
rare 12 marker set. Anyone matching the 12 marker haplotype
within a genetic distance of two can be assured of a
relationship to the Hempstead Jackson line regardless of their
surname.
It is because of the uniqueness of this Jackson ancestral
haplotype that the two family histories detailed below can be
assured of their relatedness to the Hempstead lineage.
TWO FAMILIES GENEALOGICALLY UNCONNECTED BUT GENETICALLY RELATED
TO THE ABOVE HEMPSTEAD JACKSON LINEAGE
The following two family histories are proven to be related to
the Hempstead Jackson lineage through the wonders of genetic
genealogy, sometimes called genetealogy. These families are
related to Robert Jackson b. abt 1615 England d. 1683 Hempstead
Long Island, NY, but they are not necessarily direct descendants.
Some researchers have conjectured that Robert's father, Richard,
and at least one sibling came to America in the early 1600s. So
they could be related to these early Jackson men or they maybe
related to another branch that immigrated later.
The lineage of John Jackson b. abt 1748 VA or Ireland and later
of Montgomery and Bath Counties, Kentucky, is based on a sourced
family history publicly available at Ancestry.com. The direct
male descendant tested at the (SMGF) Sorenson Molecular
Genealogical Foundation is unknown. This male descendant matched
a blend of DYS markers from a combination of Hempstead Jackson
males at both FTDNA and SMGF, such that we now know that there
is a 33/33 match with the following family.
The lineage of John A. McAnally b. 1819 Franklin County,
Kentucky is based on a family history publicly available at
http://familytreemaker.genealogy.com/users/m/c/a/John-R-Mcanally/index.html .
Two of John A. McAnally's direct male descendants tested their Y-DNA and
besides matching 33/33 with the above SMGF Jackson, they also
have matched 65/67 to the Ancestral haplotype or marker set
of Luther Jackson, a known Hempstead Jackson descendant. John
A. McAnally was truly a Jackson "raised" by William McAnally born
1798 TN. John A’s parentage is unknown but what is known
is that there is 99% confidence level that he has a common
ancestor with the Hempstead family somewhere in the past 16
generations or sometime between 1819 and 1600. The
chart below is a sample only. Actual calculations are done
from the FamilyTreeDNA site.