Very helpful, thank you.
(1) Lines descending from an uncle and nephew both born during the Revolution have very different yDNA haplogroups (I-M253 vs R-M269) with confirmed testing by branches from each of those lines. The nephew's haplotype (I-M253) is not found in any other line of the common family name except his. The uncle's birthdate is 17 years after his putative mother's, he is 10 years older than the next sibling and 23 years older than his nephew's father. Yet uncle and nephew's father (his "brother") jointly inherit their father's land grant.
(2) The two males whose trees currently define the family haplogroup are thought to belong to neither of these branches, instead coming from a man with the same name nearby in another state, though their commonly found haplogroup (R-M269) matches the nephew in (1).
This was a long time ago in an era and area with very poor documentation, and also an era where adoption was common. I'm reluctant to tell others they are wrong, but yDNA does show we are genetically unrelated. However, the tree profile manager has suggested making the correction, and I believe the two males in (2) are willing.
