Dear Mike,You are a God-send!! I have pursued this Pitchlynn/Fanklin/Purvis thing for years. I get real close and can't get any further.First let me reccomend a book, Peter Pitchlynn, Chief of the Choctaws. Most museum/archives stores carry it. It is paper back. It has all of the family tree for the Pitchlynns. Nothing on Franklin or Purvis. You can experience some of my frustration by going to FRANKLIN FAMILY FORUM, down to Thomas Jefferson Franklin, MS HOAX!!!. This man born 1822, was my ggreat grandfather. I couldnt follow you on the name of Sophia's daughter. Was she a Pitchlynn, Purvis or Franklin??Now about the half breed blood line. John Pitchlynn is the key to the family. He was born about 1756 on a ship off the Carribean island of St. Thomas. Being white and marrying Rhoda Folsom, who was a HALF BREED daughter of Ebenezer Folsom. She died after giving birth to three sons. He again married a half breed Sophia Folsom. They had eight children to reach maturity.John Pitchlyn was interpreter for the U. S. Government and negotiated the Treaty of Dancing Rabbit Creek and Treaty of Doaks stand. Giving away all Choctaw lands. This was MS territory when they came. John Pitchlynn is buried behind "Waverly" mansion between Columbus and West Point, MS.I hope we can straighten this stuff out. Go to Henry Jefferson Franklin at Familytreemaker.com, and you will read about Peter Pitchlynn,(Chief Snapping Turtle). He was a highly educated man. He spent most of his life trying to regain the Choctaw indian Lands, his father gave away. He was a personal friend of Charles Dickens.Buy the book. Holler if I can help.Merry CHRISTmas!!