Thank you for your response Kathleen. We have always known that we had a "Benninghoff" in the family and I have been to several Allen/Benninghoff reunions growing up. The confusion comes in when my nephew put the Benninghoff name on the wrong Mary Allen. George and Mary's daughter Mary J. Allen married Clem Benninghoff. I am still looking for Mary Elisabeth Hamilton's parentage (Mary Benninghoff's mother). I have tracked and recorded all of George and Mary's children. I am still searching for George and Mary's years spent in Illinois. I am at a loss as to where Mary Hamilton Allen was born in Illinois and who she is related to on that side.