Recently did some more research, thanks to the 1880 census and the Ligonier Valley Library which has a wonderful reference room! Seems the name Ferry was spelled Furry in 1880 census: Henry "FUrry". He had a brother Abraham "FErry" living in Cook Township, just south of Ligonier,who provided a home for his mother, Martha Ferry (b.3/4/1798, d.3/17/1894). This is as far back as I can get at the moment.
Though we believe the name to be spelled withthe "E" wondering ifit may have been with a "U"before 1800's?and left with these 2 questions: Who was Martha Ferry married to? What was Martha's maiden name? Thanks in advance.