From Wilson's evasiveness, refusal to talk to NDNs, attempt to get women alone rather than discuss things openly and transparently, and the total cluelessness of his defenders, it's pretty clear his "grandfather" is either a confabulation based on a brief meeting with one of the pay to pray sellouts, or a complete fabrication.
This man's actual grandfathers were undoubtedly white. Some recent ignorant defender, who doesn't seem to know the difference between a white pretendian with a personal belief they have distant heritage and an actual NDN (say, Elizabeth Warren vs Arvol Lookinghorse) is going on about DNA, and keeps digging herself in deeper by misunderstanding every single thing people point out that clearly indicates he is neither an NDN nor a ceremonial person, nor even aware of (nor willing to respect) the most basic social and spiritual conventions of NDN Country. It's shameful.
Every Native or relative reading his nuage bafflegab, and seeing his behavior and that of his defenders can see immediately that this guy and his supporters are neither Native nor can he (or they) legitimately lead any kind of Native ceremonies.
The same nuage defender/appropriator seems to think the Gathering of Nations pow wow is a ceremony (LOL!) and that visiting a pow wow can make you a ceremonial person? It's really that weird and clueless.
At some point this white guy John Wilson (aka John Little Hawk) claimed to have Powhatan ancestry (even though he's claiming to teach Lakota Medicine, in non-Lakota territories) so it looks like the usual pan-NDN lies common to white pretendians, complete with a probable visit to a pay to pray and/or pretendian sundance, now with the arrogant, White Men Make Better NDNs decision to go out and sell the misunderstoon fragments they may have witnessed (but never been trained in). Add in the delusion that Jamestown Englishmen in the family tree were actually NDNs - you know, like Johnny Depp's made up genealogy with the not at all fictional "Cleopatra" and "Princess Niketti" Disnifications that the fantasists so love to plop into trees with missing mothers. All in all it adds up to a very, very typical white fraud, spewing bafflegab to exploit spiritually-searching white women looking for solace. Add in the massage angle and, with him putting his hands on women and wanting to get women alone, there are other factors here as well.
Nothing new here. The only surprising thing is that these white nuagers keep buying into it. I guess their desire for the seekrits, even fake ones, even some made-up crap, and their hatred of actual NDNs and refusal to respect NDN sovereignty is amping up their Windigo sickness. They are determined to devour any sort of thing they think will make them feel better, or make them more powerful, or (weirdest of all) enable them to make money. The people doing this exploitation, and promoting this exploitation are soul-killers. They have cursed themselves.
