The earliest of our combined origin stories indicates that our Guthrie family descends from the Guthries of Pitforthie (Pitforthy). See Family Legends: Branch G for all of the details. Unfortunately we have a few stumbling blocks and one major hurdle to overcome before this theory can be proved or disproved. The first is the lack of a cohesive paper trail connecting our Guthrie Family Group and its numerous branches back to their pre-American origins in Northern Ireland and Scotland. Next is a gap in the records on the Guthries of Pitforthie and all of their descendant lineages. There is a spot within the Pitforthie lineage (descendants of David, younger brother of Rev William Guthrie) where our group could potentially fit, but we must be able to prove without doubt that is where we belong. The hurdle comes in the form of existing documentation and DNA evidence that might irrefutably put an end to this theory.
Our group does not have the same DNA as Guthrie Family Group 1A (aka The Middlesex Group) who match Lord Charles Ronald Llewellyn Guthrie, a descendant of the Guthries of Craigie. Although the Guthries of Guthrie were the main line of the family, many offshoots existed, some of them mentioned in an old rhyme: "Guthrie o' Guthrie and Guthrie o' Gagie Guthrie o' Taybank an' Guthrie o' Craigie." There were also the Guthries of Carbuddo, of Colliston, of Kinblethsont, of Menmuir, and of Pitforthy. "So from any one of these branches our ancestors may have stemmed," wrote Mary Grey May in her book on the Guthrie Family of Greene County, PA (Branch D).
Prior to the use of DNA testing for genealogical study many people of the Guthrie surname believed that we all shared a single bloodline stretching back over 700s years and that the 'castle-builders' and all of the famous or infamous Guthries named throughout history were our kin. Not so. Logic alone will tell you that there is a lot of potential for things to happen over such a long period of time that might cause more than one bloodline to be associated with a single surname: regional and feudal connections, heraldic laws, adoptions, and paternal events.
At least 3 of our Guthrie Family Group's branches include origin stories that link them to the Guthries of Pitforthie or Guthries of Guthrie. Either there is a genetic connection there with a broken link to the Craigie lineage or a historical connection to that family. The challenge is finding a way to prove it one way or the other.