As you may know, Benjamin South is recognized as a descendant of the Fuller family (Edward, his wife Ann (?) and their son Samuel) who were passengers on the Mayflower.To my knowledge the descendants of at least two of his children, James South and William South, have been accepted for membership in the Mayflower Society. I am a descendant of William South and strongly believe that your ancestor Daniel was a brother of my ancestor William. The only proof is from a secondary source, the History of Clermont County in which there is a brief biographical mention of Daniel and William.I am not aware of any primary source proof but if it exists it would be found in Clermont County.Last summer I was able to track down and visit the Daniel South Cemetery which is on a small acreage outside of Owensville, Ohio. Let me know if there is anything I can do to assist you in your search.