The Davis family was relatively easy to find in public records because of the completeness of their names on the back of the photo. The 1900 Federal Census for Allen Co, Ohio matches the family exactly. But from there the trail is more complicated. It’s possible that the son Floyd died in 1918, I have that death certificate. And there are several possible families that the mother Susan belonged to. I did not immediately see anyone searching for this family on Ancestry.com, but I do hope there’s someone out there who knows them.
Oh, the back of the photo also stated the the mother, Susan, was the sister of Mrs. John E. Watkins.