The Results are shown in chart form
on the "DNA Results" page. Similar results are grouped together, and mutations
are noted by
Most Thompson families in our
project originated in the British Isles. To further your genealogical
research, please see Linda Jonas's
Guide to British Isles Research.
best matches in the Thompson family (so far) are discussed below. There are several other possible matches, which should be evaluated by test
upgrades and by the submission of pedigrees to our Patriarchs page.
T-2 and T-8 share a common ancestor
in a Scots-Irish Thompson family. Genealogy has been traced from America
to Ireland then to Scotland. The Most Recent Common Ancestor of T-2 and
T-8 is Matthew Thompson b. c1720-1725 in Co. Donegal, Ireland [part
of Ulster]. Matthew emigrated to America and lived in Lancaster County, Pennsylvania, then
Augusta County, Virginia before moving to South Carolina about 1772-1773
(based on deeds in VA and SC). This is a
typical Colonial-era Scots-Irish migration path. T-2 is descended from Mathew's
son William, and T-8 is descended from Matthew's son James. To find the
estimated time to the Most Recent Common Ancestor, we can use the Family
Tree DNA Time Predictor (FTDNA TiP). This tool compares the 35/37 match
and predicts that the probability that T-2 and T-8 shared a common
ancestor within the last 100 years is 30%, within the last 200 years is
70%, and within the last 300 years is 89.97%. These probabilities take
into consideration the mutation rates for each individual marker being
compared. The tool proves to be quite accurate since we know from
genealogical records that the Most Recent Common Ancestor
was born about 280 years ago, and his sons were born about 225 years
ago. We welcome
other men from this lineage to test, especially any who might remain in
Ireland. T-2 and T-8 are in the C haplogroup, which is anciently Asian. T-8
has had a SNP test confirming this, and T-2's haplogroup assignment was
confirmed by a deep SNP test.
Both men may learn more in the next few years from the National
Geographic Genographic Project about the migration of the C haplogroup.
T-45 and T-68 are
descended from Richard Thompson who was born in 1528 in either England
or Scotland [the pedigrees disagree on the birth place]. This is
another extraordinary match, because these two men do not share a common
ancestor for at least eight generations. Their Most Recent Common Ancestor is William
Thompson, b. 1742 MA, who married Lydia Dyer, so he shared their
Y-chromosome markers. To confirm the pedigree for earlier generations,
we seek descendants from other lines of William Thompson, b. 1713 MA, m. Mehitable Hillard; Benjamin Thompson, b. 1684 MA, d. 1750, m. Sarah
Aldrich; John Thompson Jr., b. 1642 MA, d. 1739, m. Thankful Woodland;
John Thompson, b. 1618/19 England,
d. 1685, MA, m. Sarah Woodman;
David Thompson, b. c1592, d. 1628 England
m. Amyes Colle; Richard Thompson Jr., b. c1555, d. 1603 England, m.
Florence Cromlan; and Richard Thompson b. 1528.
T-15 and T-51 share a common
ancestor. This match is the result of advertising for descendants to be
tested of Thompsons from North Gwillimbury, Ontario. The advertisements were placed in
genealogical society publications. The Most Recent Common Ancestor
of T-15 and T-51 is John Thompson, b 1736 in Connecticut. T-51 should
consider an upgrade to verify the match. Genealogical research is
ongoing. Males from other lines of this family should be tested.
T-30 and T-31 are
descendants of David Thompson b 1766 in Windsor, Connecticut. Their Most
Recent Common Ancestor is David's son Isaac Thompson who was born about
1810. The 25-marker results of T-30 and T-31 show only a
one-step-mutation difference, so Isaac had one of these two genetic
profiles. David should have had the same genetic profile, but this will
not be known until a match is found from a descendant of one of David's
shows that T-26, T-21, T-22, and T-19 share a common ancestor. Their
Most Recent Common Ancestor is George Thompson (b. 1705) who married
Catherine Phillips. T-26, T-21, and T-22 are descended from George's son
John Thompson but T-26, T-21, and T-22
are very closely related. Their Most Recent Common Ancestor is several
generations removed from their ancestor John Thompson, so no conclusions
can be drawn from their results about the genetic profile of the
ancestor. T-19 is descended from George's son William. He does not
match the other group closely enough to determine their ancestor's
genetic profile. More male descendants of George Thompson (b.
c1670) are needed for testing.
T-65 and T-67 share a
common ancestor. They should research the records of Hampshire and
Frederick Counties, Virginia.
T-12 and T-52 share a
common ancestor. This is an extremely close match, and the
ancestors of both men were in North Carolina in the 1700s. T-52 should
search the records of Duplin and Bladen Counties, North Carolina for any
mention of Alexander Thompson.
T-42, T-88, and T-25 share a
common ancestor. The Most Recent Common Ancestor of T-42 and T-88
is Electious Thompson, b. 1755 in Prince George's Co., Maryland. T-25
should submit his pedigree to our Patriarchs Page so that we may be able
to more closely determine when his ancestry ties in with the line of
are only useful when used in conjunction with traditional historical and
genealogical research. The Thompson DNA Project Administrators both have
experience in evaluating and extending pedigrees, and have access to many
records that can help make ancestral connections.
There is more information about
Haplogroups at the World Families Network site. Click
here for Y-Haplogroups
Feel free to discuss the Thompson
Thompson Family Forum
information, contact Linda Thompson Jonas or Katherine Borges
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Last Published: 07/30/2005 09:27:16