This was in my grandfather's collection, but was not labeled. I suspect that it is someone from his second wife's Kleinhenz family, but they could also be from the Creeden, Pulskamp, or Niehaus families.
Updating to add that the mystery has been solved! The wedding photo is of Dr. Edgar J. Willke and Alfrida Kleinhenz. They
were married on July 21, 1931 at the Holy Rosary Catholic Church in St.
Mary's, Ohio. My step-grandmother Hilda was Alfrida's sister and the maid of honor. See more here.