Hi Barbara.... I didn't find anything on her parents in my books. I did find the marriage of Eva to David, do you have this? It also lists his parents names.
I did find a listing for a Christian F. Eisenmann, in Wills Recorded in Deed Book, and it lists him as having a son named Charles. This sounds like it may be Eva's grandfather. Do you have this info, it says he made his will out in 1892, and died either that year or very early 1893. Does any of this sound familiar to you?