Ah - see the curator note for Henry Sizemore
“Henry Sizemore was born c. 1698. He married first Elizabeth Parker. He married second Elizabeth Rhodes, c.1721 in Henrico Co., VA. Henry is the probable source of the American Indian haplotypes in Sizemores. Read DNA info below.”
So it looks like HENRY needs disconnect and assigned to unknown native parents, do I have that right ?
You might want to read the following: http://www.sizemorecherokeerecords.com/ECAS/Miller_Report.php
and look at some of the applications to try to figure out the tree. General consensus seems to be that there was a Catawba connection, though when and from whom is unclear.
Here’s Dr Johnny, son of Dr. John "Johnny Goard" Sizemore, II , missing his brother Ned the preacher
Well, it's not much help I know but I triangulated a few years back on GEDMatch to the George Sizemore & Aggie Sheppard couple that contributed those Q-L568 Y-DNA descendants, although I descent from their daughter Susan Sizemore. My autosomal DNA results uploaded to GEDMatch for comparison to their ethnicity databases only shows my at 1% to 2% Native America DNA. There were Sizemore that came to Virginia but they would of interacted with the Powhatan and not Catawba tribe, who were only near the area of Spartanburg, South Carolina while the Powhatan where still in the area of Tidewater Virginia at the time of the Sizemore's arrival there.
My 1% - 2% would be roughly equivalent to 8th Great Grandparents if there were the only line that had Native American ancestry from that time. That's not likely, there was likely one or two more so that put the Q-L568 Y-DNA likely to be before 1650 and 10th to 12th Great Grandparents.
It's all just a rough estimate based on others Sizemore trees and the percentage of Native American DNA I tested for and that it's proven George Sizemore, my 6th Great Grandfather, had Q-L568 Y-DNA.
OK, sorry but my math was off above.
Since George Sizemore is my 6th x Great Grandfather if he was 100% Native American I would have on average only 0.4% Native American ancestry. I have more than that so I must have more than George Sizemore & George Sizemore's ancestors as Native American ancestors. The only way to really figure out is to triangulate special DNA known to be Native American to individual ancestral couples.
It sounds like an interesting technical challenge but one that I'm not interested in doing until 1) I source all the people in my tree and 2) the servers doing the triangulations are much faster than the current servers we customers use.
Also, since it was likely George Sizemore was 100% or 50% Native American and seeing the area of North Carolina he was free he most likely was Cherokee or Catawba and not Powhatan. Given the location I think it must be Catawba is more likely than Cherokee. Catawba is a Siouan branch speaking tribe while the Cherokee are a Iroquoian branch speaking tribe.
The Catawba did band together with the Cherokee and Choctaw tribes too to muddy the waters even more. Choctaw is a Muskogean language family and further such, so George Sizemore was unlikely a Choctaw tribe member,
And to finish things out the Powhatan tribe language is a branch of the Algonquian languages.