Guilford Co, NC-Nancy Ann ALLISON/DUFF

Allison families of Guilford Co, NC during the Rev War? I have Nancy Ann ALLISON b abt 1776 Guilford who m abt 1795 Guilford to Rev. Daniel DUFF b 1772 Guilford. They moved to Floyd Co, KY bef 1810 and she d Aug 15, 1849 Perry Co, KY. Any clues for her possible PARENTS? The father of Daniel DUFF her husband was Samuel Henry DUFF b 1707 Dubtown, Scotland who m abt 1740 in Ireland and d 1767 at sea on the way to America. Did ALLISONS come from Ireland to NC about that time?