This is a bit of a supplementary to a question asked earlier today.
I've recently had a small match on 23 and me on the X chromosome. This is the first person I have matched with that I've been able to find a common ancestor. The match doesn't have a tree on here but does have one elsewhere.
My ggg grandfather Arthur was the brother of Jeremiah, my matches ancestor. Because they were males this means the DNA segment in question had to have come from their mother Mary Arthur http://www.wikitree.com/genealogy/Arthur-Descendants- (the segment passed on my side entirely through females, on my matches side there was one generation where it passed through a male but otherwise all females )
At the moment, my match has not got a tree on here; he does seem to have joined as a guest but no further. I know I couldn't accurately source his tree because his family are in Canada (don't have good source access)
Could I say that my paper trail ancestry to my gggg grandmother Mary Arthur is confirmed by DNA?