WHY DOES SOMEONE OF A DIFFERENT SURNAME MATCH OUR GUTHRIE GROUP?
There are quite a few reasons. A genetic match at the Y67, or Y111 marker level indicates that a genetic relationship does exist even though two participants may have different surnames. The two main reasons for this genetic switch are paternal events and adoptions, although there can be other historical causes. These events may have occurred in recent generations or much more distant ones. Sometimes a little research can provide answers, but many times the cause remains a mystery. DNA can again provide some clues if members of that particular lineage work together.
Guthrie Family Group 2A has a few individuals who match our DNA, but do not share our surname. At some point in the past (either recently or distantly) a Guthrie from our genetic family tree crossed paths with their family line. Most likely either a female of their line pregnant by a Guthrie and raised with that other surname, or a Guthrie male who assumed that other surname via adoption.
SURNAMES MATCHING GFG2A (As of April 2014):
There are 2 men of the ALEXANDER Surname who match our DNA Profile. One at the 67 marker level, and the other at the 37 marker level. The latter has only done a Y37 marker test. Neither man is a member of the Guthrie DNA Project. Lineages unknown. Interestingly, it appears that one lived in Australia and the other in Utah. So if the two do share an ALEXANDER ancestor, it is likely to indicate a much older GUTHRIE match as the genetic switch would have had to occur prior to their two lineages splitting off to different parts of the world.
We have 1 match to a man of the FORD surname. His historical family lineage is that of Patrick Ford 1783-1861 & Jane Beckwith. They were from Ireland and emigrated to New Brunswick, Canada. Their line later moved to New York State. When examining New Brunswick records, there were a couple of Guthrie families living in that area at the same time as this man's ancestors.
We have 2 men of the ROY surname who have joined the Guthrie DNA Project so that we may directly compare genetic markers. This allows us to determine whether or not the ROY men share any pattern markers with other members of the project and potentially to place them within one of the previously established Clusters, which tells us which branch they are most closely related.
Participant KCR descends from Joseph Roy 1739-1798 of Pendleton County, VA & Joley Summerfield. The line potentially descended from Hugh Le Roy of England. KCR is a match for GFG2A at the Y111 level. No doubt about that genetic connection.
The other ROY surname match is Participant EBR, who most likely shares a ROY ancestor with KCR. EBR is a descendant of Isaac Roy 1810-1864 Virginia & Elizabeth Green.
Both ROY participants share a distinct genetic pattern with our TORDIFF surname participant (see below). They most closely match the two descendants of Archibald Guthrie 1753-1779 PA & Rebecca Phillips. Neither the Roy line of VA nor the Tordiff line of Ontario are known to have crossed paths with this Guthrie lineage on this side of the Atlantic.
DYS458=17 (Both Archibald Guthrie descendants, Tordiff, and both Roy participants)
DYS464a-d = 15-15-17-17 (Tordiff and both Roy Participants. One of the two Guthrie participants also shares DYS464d=17)
A man of the TORDIFF surname has joined the Guthrie DNA Project. As mentioned above, he shares the same genetic pattern as the two Roy men, and is most closely matched to our to Branch D descendants of Archibald Guthrie & Rebecca Phillips.
Participant JT is a historical descendant of William Tordiff 1801 Plumbland Parish, Cumberland County, England & Hannah Huggins. This couple emigrated to Durham County, Ontario, Canada.
Because both the ROY participants and the TORDIFF participants share the same pattern markers, it suggests that the same branch of ancestral Guthrie DNA was passed on to both lineages. This could have occurred separately or in sequence - Guthrie to Tordiff to Roy, or Guthrie to Roy to Tordiff.