There were Millers in Raccoon Twp, Parke Co, who were Dunkers (Brethren.) If you inquire of the brethren@rootsweb.com, (by subbing to the list), you may learn if the Millers in Raccoon Twp were the same ones, or related to the ones, in Ladoga. Daniel Miller is such a common name, there may be several of them around. I once received condolences from a genealogist because my maiden name is Miller. Census records and tax duplicates may be helpful to you. I hope that play surfaces somewhere.