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Corson Surname DNA Project Newsletter - 16 Sep 2005 

Hello everyone, 

Since last month’s report, one set of results arrived that raises an intriguing question about Division III descendants. There’s also some news for a few other Divisions. 





17 participants, 17 test results reported

Genetic matches: 2 sets of three, 3 sets of two, 5 unmatched

Genetic family lines: 10 (7 in haplogroup R1b; 1 each in I1a, I2*, and E3b)

Average time for lab to process a DNA sample: 10.8 days

Average time from sign-up to receipt of test results: 35.3 days


Division I (New England) – 3 participants, 3 results

Relative Genetics upgraded its website this month (see below), which provided extended results for marker DYS 464. This revealed that the Colson participant from this Division has six copies of DYS 464, whereas most people have four copies. His DYS 464 values are <15,15,15,15,17,17>, while those for the other two participants in this Division are <15,15,15,17>. Thus, a mutation occurred in this participant or one of his ancestors that appears to have copied the <15, 17> pair twice. Such a mutation occurs in only ca. 2% of individuals tested; thus, it is a very good mutation to have to find relatives within the same specific family line.

We are still looking for male-line descendants of Samuel Corson (1719-1810) (Div. I-D) and Ichabod Corson (c.1725-c.1800) (Div. I-F) who would be willing to participate.

Division III (Staten Island, NY) – 4 participants, 4 results

Results from the second Vroom participant arrived this week. He matches the other Vroom participant on 41 of 42 markers (all but DYS 464), which confirms that they share a common ancestor. Their most recent common ancestor (MRCA) is documented as Hendrick Vroom (1683-1769), who was a grandson of progenitor Cors Pietersz (1612-1655). Their genetic signature does not match that of two Corson participants whose documented MRCA is Benjamin Corson (1686-1740), another grandson of Cors Pietersz. Thus, each pair of documented Vroom and Corson descendants of Cors Pietersz has a different genetic signature, but only one pair of them can have descended from Cors Pietersz.

This provides additional incentive to find other Corson and Vroom descendants of Cors Pietersz to join the project. A descendant of one of Hendrick Vroom’s or Benjamin Corson's brothers could help us push either genetic signature one generation closer to Cors Pietersz. Thus, we are looking more earnestly for male-line descendants of Benjamin Corssen's brothers Jacob (1681-1742) or Christian (1676-aft. 1764) and Hendrick Vroom’s brothers Cornelius (b. 1677) or Alfred to participate.

Division VIII (Colsons not derived from Corsons) – 1 participant, 1 result

This Colson participant recently discovered information that pushed the identity of his male-line progenitor back by two generations. His progenitor now is documented as Adam Cols(t)on, born ca. 1660. Adam married Mary Dastin, whose son David Colson (born 26 Apr 1682 in Reading, MA) was the father of this participant’s previously known ancestor, John Colson. The participant’s genetic signature has matches that suggest that his male-line ancestors came from Great Britain, possibly northern Ireland or highland Scotland.


Division II (Sussex Co., NJ) – 2 participants, 2 results

More participants from this Division are welcome; their results could help strengthen the assertion that we know progenitor Jan Corszen’s genetic signature.

Division IV (Cape May Co., NJ) – 4 participants, 4 results

We need to find at least one more participant from this Division to resolve the uncertainty about Carsten Jansen’s genetic signature.

Division VII (Hunterdon Co., NJ) – 1 participant, 1 result

The participant from this brick-walled Division has yet to match anyone closely.

Divisions XIII, V, VI, and IX – no participants

We’re still working to recruit living male-line descendants of Daniel Corson (1763-1849), who moved from Sussex County, NJ to Ontario, Canada. We're also searching for participants with ancestors from European Corsan / Courson / Curzon / Korson families.

Unconnected – 2 participants

No close matches have been found for these participants in any public Y-DNA database or in Relative Genetics’ database.


Relative Genetics, the DNA testing lab used by the project, updated its website recently. As mentioned, the upgrade included extended reporting for marker DYS 464; so, you now can see additional values for this marker reported on the results page of the project website. In addition, participants in the project now have the ability to search for matches to their genetic signatures among other individuals tested by Relative Genetics.


The CCFHA still has a $40 reimbursement of test costs available for one more participant. We may be able to find additional funding for participants whose results would help us establish progenitors' genetic signatures. Those unable to submit a DNA sample directly (e.g., not descended in the direct male line) can participate by helping to subsidize the test cost for someone else. For many people, the test cost ($195) is the greatest barrier to participation. Please contact Michael Corson if you would like to help subsidize a portion of a participant’s test cost.

If you have any questions about the project, interpretation of test results, or genetic genealogy in general, please contact me. If you’d prefer not to receive the newsletter, just ask me to unsubscribe you. The project website contains current and back issues of the newsletter that you can browse. If you know someone who would like to receive this newsletter, please ask that person to send me an e-mail address to subscribe.

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