I appreciate that this thread is now a bit old, but I have only just seen it, having very recently joined RootsChat. I recognise a lot of the Knapman names mentioned above, and if anyone seeking a Knapman ancestor cares to look on the Devon genealogies pages of the genuki website, they will find a document there giving all of the Knapman families that I have been able to trace. The easiest way to find it is simply to google "Wider Knapman Family". I have recently taken a Y-DNA test, and would encourage any other male Knapmans out there to consider doing the same, via the familytreedna.com/public/Devon group to check out family lines.