Provisional conclusion on genetic origins of the family
With a few more samples analyzed, we now see that there are likely to be multiple Y-DNA lines within the name, so that hypothesis 1 is not supported (not only one haplotype for all NE Scotland Lobbans). Among the new samples are two people whose results do not match with the “NE Scotland” haplotype / Logan “Limb 7” and on the basis of advice from International Society of Genetic Genealogists* we are interpreting these as new origins of the name, rather than non-paternity events,** which are rare (best estimates about 2% of the population) (source).
One of these new samples maps to Logan Project “Limb 3,” and this person traces his ancestors back to the Black Isle. This suggests that we may have found a representative of the “Black Isle” Lobans, but that conclusion would be based on an assumption that the earliest known ancestor lived where the founder lived, when in fact the earlier (unknown) ancestors could have come from NE Scotland. I will not yet claim to have supported the hypothesis of one origin in Black Isle, but the evidence is consistent with it.
The other, whose earliest known ancestors are fairly recent, unexpectedly has matches with two people from Rogaland province in the south of Norway. This is only 300 nautical miles from the Banffshire coast, and it is tempting to assume that this founder came from Norway, and preliminary analysis of the antiquity of the most recent common ancestor (MRCA) seems to correlate with Viking times, about 1300 years ago, or 700 AD. This is a much more ancient connection than that between the four R-JFS0275 lines, and pre-dates the introduction of surnames.
* “… in a young, multi-source surname project, it should be assumed, pending further evidence, that all participants or genetic families using the project surname but having genetic signatures that do not match any of the other genetic families in the project, represent a new, original branch of the surname.” (source)
** “A non-paternity event is any event which has caused a break in the link between a hereditary surname and the Y-chromosome resulting in a son using a different surname from that of his biological father.” (same source)
Page created by Christopher S. Lobban, 14 Dec. 2018.