The other day I was contacted by the Find-A-Grave volunteer who photographed Great Great grandmother Filomena Napolitano’s headstone a couple of months ago. She related that she had found another headstone for a lady with the same name, same dates, in the same cemetery 7 rows away in the single plot area. This newer headstone is nicer than the flat stone. She put it on Find-A-Grave and it can be seen here with the rest of her memorial and the other headstone.
Mt. Calvary Cemetery will need to be contacted. It is the oldest Catholic cemetery in Columbus, known for its section for priests, and they should have kept great records.