Problem is, the absence of native American in DNA results doesn’t mean doesn’t have it.
Except for identical twins, sibling DNA will be different. One could show native American and one might not.
Not only that, how distant is the ancestor in question?
“Except for identical twins, sibling DNA will be different. One could show native American and one might not.”
My sister had her DNA done and it showed she had some percentage of Native American. Now, our people from both my father’s side (Germany) and my mother’s side (England) had no connection with North America until the 1840s on my father’s side (and they never ventured any further than New Orleans) and 1947 on my mother’s side (that was when she came to the U.S., at 21). Maybe some Viking raider in the way back sailed over here in the 1300s and snatched up some Indian maiden and impregnated her, and then took the issue back to Europe with him, and that Viking raider was some kin to me. However, I doubt it.
I’ve done extensive genealogical research over the years and got back as far as 1610 on my father’s side, and EVERYONE in that line stayed in Germany until the 1840s, and there is no mention of any dalliances with a dusky princess of the prairies.