My wife is a Carson & descends from the line of William Carson, b. abt. 1763, Ballybay, Co. Monaghan, Ireland. This line probably appeared in Co. Monaghan in the late 17th Century, reportedly descending from another William Carson, born about 1655 in Scotland. This Carson line appears in entries at Ancestry.com (e.g. Kahlstorf Family Tree), and in “The Carsons of Ballybay”, by David Melville Carson. Go to http://contentdm.lib.byu.edu/cdm4/search.phphttp://contentdm.lib.byu.edu/cdm4/search.php Type “The Carsons of Ballybay” into “The exact phrase”. Page 19 in the Appendix discusses migration from Scotland.
We now have results on yDNA of one of my wife’s brothers from www.familytreedna.comResults indicated membership in Haplogroup J2, which is somewhat unusual in Britain. To date, our Carson yDNA results match no other sample in the Carson DNA Project, where our sample (Family Tree DNA Kit # 183866) is the sole J2 representative. Our sample also appears at www.ysearch.org under ID # YQ289, and likewise matches no Carson, but does have an exact match to one Scott surname & several near-matches (36 of 37 STR markers) to other Scott persons. Our Carson sample (Kit # 183866) now also appears in the Scott DNA Project, where there are several other Haplogroup J2 persons & STR matches.
Correspondence with several Scott persons carrying Carson yDNA matches reveals no apparent intersection of migration patterns within America between any Scott line & our Carson line. Most of these Scott persons cannot connect their ancestry to any specific part of Ireland or Scotland, as the lines appeared in America so early.
If the intersection of Scott & Carson occurred in Ireland, County Monaghan seems a prime suspect. The Scott sample (FTDNA Kit # 99017) which exactly matches our Carson sample has a 96% chance that the Most Recent Common Ancestor was within 7 generations. From my Carson brother-in-law back to M.K. Carson (b. abt. 1740) is 6 generations.
What we really need now are more yDNA samples from Carson & Scott surnamed male descendants of both lines, specifically connected with County Monaghan. Any documentation of association between Carson and Scott persons within County Monaghan could prove very helpful, too.