The Severance Book by Dewsnap does take this back further.The book can actually be purchased through Heritage Books online, if you are interested. (And actually has more info than I could type here.) It is http://www.heritagebooks.com/http://www.heritagebooks.com/
Per Dewsnap, Paul was the son of Thomas Saverance and Sussannah Murrell of Charlestown. Thomas was the son of John Savarence and Ann Barton. John Savarence was born at Christ Church Parish, Berekeley Co. SC before 1718. John died in Charleston. John was the son of John born 9-22-1676 in Boston, MA., wife Catherine__.