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For the Corson Cousins newsletter, October 2014

Corson Surname DNA Project

The project currently has 69 participants, 68 of whom have results.  The most recent results arrived for two descendants of Division III.

 Recent Results

Division III

Participant #68, with the surname Coreson, documents descent from progenitor Jeremiah Coreson, born 4 Feb 1812 in Richmond County, New York.  Jeremiah moved to Michigan, where his son was born, and his son’s son moved from Michigan to Oregon. 

Participant #68’s 37-marker STR results indicate that Jeremiah Coreson descended from Division III.  His genetic signature has some mutations from the Division III signature: a value of 19 (instead of 20) for marker DYS448 and values of 38-38 (instead of 39-40) for marker CDY.  At the moment, no other Division III participant has these differences, but they are good to have so that we can look for future Division III participants who also have them.

 Participant #69, with the surname Corson, documents descent from Cassius Calvin Corson (1859-1948) of Jacksonburg, Ohio.  Cassius’s parents were Magdalena Weaver and an unknown father, although a later baby-book entry by Cassius’s daughter suggests that it may have been a “Wilson Corson”.  Oscar Taylor Corson (1857-1928), a well-known local author of his day (and second cousin once-removed of family historian Orville Corson, Division III), came to speak at the “boxwell” of Cassius’s daughter, suggesting that a close family relationship existed.

Participant #69’s 111-marker STR results indicate that Cassius Corson indeed descended from Division III.  He has two mutations that match those of Participant #61: 40-41 for markers CDY.  However, these markers mutate more quickly than many of the other markers, meaning that they do not necessarily indicate a close relationship in and of themselves.  He also has a mutation on DYS 570 (value=20), but no other participants share this mutation, and it is also a “fast mutator”.

If anything, it is the relative lack of mutations that makes his DNA results more interesting.  His lack of mutations on the first 37 markers, coupled with mutations in other participants’ results that he does not share, is most consistent with Participant #51.  Interestingly, the potential relationship between Cassius Corson and the recent ancestors of Oscar Taylor Corson and Orville Corson would suggest that, among the Division III participants, he is most closely related to Participants #49, 7, and 51.

If Cassius was closely related to Oscar Taylor Corson, however, the participant’s relationship with these three participants would still remain relatively distant.  Oscar Taylor Corson's line diverged from Participant #51 at the birth of Daniel Corson, Sr., in 1756.  Thus, Participant #51 and 69 could be something like 6th cousins.

So, at the moment, his DNA results indicate no close relationship with other Division III participants, but they do remain consistent with a potential relationship with Oscar Taylor Corson's line.

 I’ll write about my Division I SNP results in the next issue.  If you can’t wait, visit the Division I summary on the DNA Project website ( for details!