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For the Corson Cousins newsletter, July 2007
Corson Surname DNA Project
During the last quarter, one participant joined the
project and two received DNA results.
Participant #33, with the surname Raisor, received
his test results a few months ago. He
wished to test whether he descended from Teunis Corsa (ca. 1702-aft. 1763),
grandson of Division II progenitor Jan Corszen (ca. 1649-1703).
According to documentary evidence, Teunis changed his name at one point
to “Racer” and bore sons with that surname.
The project has identified the genetic signature of Jan Corszen based on
documented genealogies; it belongs to haplogroup I1a.
The participant’s genetic signature belongs to a different haplogroup
(R1b), disproving a male-line relationship with Jan Corszen within at least 4000
years. In contrast, the
participant’s genetic signature has close matches (and one perfect 43-marker
match) with men with the Osburn(e) surname.
At least one Osburne traces his male-line ancestry to England; thus, it
is possible that the Raisor participant also may find his male-line ancestors
Participants who test with the labs Relative Genetics
(most project participants) or FamilyTree DNA (a few project participants) will
have their DNA stored for 20 years in laboratory freezers by default (unless a
participant requests having his sample destroyed).
This “banking” of DNA is very useful for performing additional future
tests, which are continually improving. Testing
additional markers on the Y chromosome can indicate with greater precision how
closely two men may be related. For
example, based on average mutation rates, a perfect match on 43 markers
indicates a relationship 1-10 generations in the past, while a perfect match on
67 markers would indicate a relationship within 1-8 generations.
In some cases, this extra degree of precision becomes important.
It is also possible to store DNA at home.
Kits selling currently for about $10 allow individuals to store saliva
samples (containing buccal epithelial cells that contain the DNA) on special
index cards. They provide very
basic DNA storage that can be used for future genealogical or even medical
tests. If you’d like more
information about them, write me or visit this website: http://dnafiler.com
DNA from Canada
Participant #34, with the surname Corson, joined the
project and received his results recently.
He documents descent from Daniel Corson (1763-1849), who moved from
Sussex County, NJ, to Ontario, Canada after the Revolutionary War.
The participant’s genetic signature matched almost exactly (41-42
markers out of 43) that of 3 other Corson participants (#7, 9, and 27) whose
documented genealogies merge at an ancestor named Benjamin Corssen (1686-1740),
documented grandson of the Division III progenitor, Cors Pieterszen (1612-1655).
Thus, these results indicate that the participant and
his documented ancestor Daniel Corson are related in some way to Benjamin
Corssen. Until and unless we can
find documentary evidence, however, we won't know whether Daniel Corson was a
direct descendant of Benjamin Corssen or one of his cousins.
If you have Internet access and would like
information about the DNA Project between issues of Corson Cousins, you
can visit the project website: http://www.geocities.com/misccorson/dna/