Hi there, Im also searching for a Mary Hayes married a John Barnewell, daughter Elizabeth was my Great Grandmother, she married Patrick Doyle of Foulksmills. Doubt that theres a connection as yours seem to be a bit later than the years im searching. But just to let you know the name Banville could be transcribed in documents as Barnwall, Barnewell, Barnwell and Barnawell also. It is something that I have come across in my research! (Which is very little at this point!)