52 Ancestor Challenge - Week #15 THE CHINN/CHYNN MYSTERY

My 6th great grandmother was Ann Chinn who was married to Robert Edwards. I have information that she was born 1702 in Lancaster County, Virginia daughter of Joseph Chinn & Elizabeth (Ball) Chinn.  Ann was listed in the will of Joseph Chinn recorded 19 May 1774.  His will lists son: John Chinn; Daughter: Ann Edwards; Daughter Elizabeth Montague; Granddaughters Jane Montague & Priscilla Chinn; Grandsons: Joseph Chinn & John Yates Chinn.  Son John was listed as executor of the will that was made 1 June 1771.  From this point back it gets very cloudy. The big problem is there are so many with the same first names and the parents of my Joseph Chinn may not be the ones I had listed.