Their marriage record is held by the Montgomery County Records Center & Archives, 117 South Main St., 6th Floor, Reibold Bldg., P.O. Box 972, Dayton, Ohio 45422. Their phone number is (937)225-6366. They do not look up information by phone. You either have to go there or write to them and they will send you a form to fill out and mail back to them. I don't know what the cost is by mail.
I'll let you know when I go to Rehobeth Cemetery. I'm trying to get ready for Thanksgiving, but I hope to go soon.