Man, it is so hard to say. My mom always claimed she was 1/8 Potawatomi. I thought she made that word up, but learned it is a real tribe. She had an old photo with one of my ancestors with his clearly Indian bride. So, for many years I told folks that I was part Indian. When enrolling my kids at school, there was a woman there inquiring into whether any of the kids had Native American ancestry. She was looking to hook people up with some type of benefit. I told her my kids probably had some ancestral ties, but we really didn't overtly embrace them and weren't looking to get anything based on that. She very pleasantly nodded and moved on to the next group of people. Fast forward about 15 years and my 20-something daughter takes on of those DNA tests. The report she received indicated she was pretty much a saltine cracker.Native American, Mexican and white. Pretty much a mutt.....or like one of my old bosses used to call me a "halfbreed".
I honestly don't know. Could you get from 1/8th to less than 1/100th in two generations? Are those DNA test bogus? I do have quite a bit of artwork related to Native Americans. The End of the Trail is one of my favorite sculptures. I have even been known to quote Chief Joseph.