Blennerhassett surname

For some years I have researched history of the Blennerhassett family (usually spelled with two “t”) whose origins lie within the lovely village of Blennerhasset (in modern times spelled with one “t”). The results of research to date may be seen at and your further contributions are requested, they may be sent via that website. I am especially interested to receive information on the history of Blennerhassett Hall.