Mark Humphrys of Ireland has a website called http://humphrysfamilytree.com/ where he posts the ancestry of him and his wife. In his ancestry he is descendant of the Cashel Family whose most ancient known ancestor is George Cashel[http://humphrysfamilytree.com/Cashel/george.html] whose parents according to his great-granddaughter were Edward Cashel and Letitia Blennerhassett. The Blennerhasset were an anglo-irish and protestant family with a wonderful pedigree including a royal descent and so Mark wants to know the true connection. He has a huge amount of circumstantial evidence that Letitia Blennerhassett mother of George Cashel is Letitia Blennerhassett of Tarbert[http://humphrysfamilytree.com/Blennerhassett/letitia.html] descendant of Edward III , he even launched a challenge with a 1000 dollars reward to the person who discovers the connection. For the evidence see http://humphrysfamilytree.com/Blennerhassett/evidence.html. If you have any knowledge about these families please tell.