You speak of the William Wallace otherwise known as Braveheart I suspect.
Obviously, this is a line of Wallaces that extends to the earliest genealogical times of Scotland. In the Wallace DNA Project, we have at least two Wallaces in the project who directly claim this line of Wallaces extending to a Wallace of Glasgow, Scotland, in the 1600s. By deep YDNA testing we know this line extends backwards through the earliest genealogical times of Scotland to a time 1000s of years before any male got to Scotland and adopted the surname Wallace. Downstream, we have some 80 males of several different YDNA branches scattered variously to the Jamaica, the U.S., New Zealand and Australia who can reasonably claim this line. Many of these males now match nicely by Family Finder (FTDNA) into this same line more broadly in the sense that we have matches also of Canada and Mexico. We may have as many as 120 males and females of several different closely related branches who can claim matches into this line of Wallaces. Hope this helps. /Don Wallace / firstname.lastname@example.org
/Administrator / Wallace DNA Project