Bohn woman of Hamilton

These are the Bohn sisters of Hamilton, Ohio with whom we believe to be one of their grandmother's and a friend or family member we can't identify. From left to right is mystery woman, Marie Gregg Bohn, in back Catherine Frakes Bohn and Elisabeth Elam Bohn. The woman on Marie's lap was very frail and we know one grandmother died in the 1930's.

The woman on the left is very attentive to the woman on Marie Bohn's lap and we feel she must be family but who is she? No one knows. Also can anyone identify the woman on Marie's lap? If she is their grandmother? Is she a Bohn or a Layer? This was a very old photo that was damaged and was remade.