The Youngblood family is a promanent family from the East Coast. There is a book, "Youngblood-Armstrong and Allied Families" by Frances Youngblood and Floelle Yoingblood Bonner. Check with your library, they should be able to get a copy through inter-library loan program.
A Buford Lynch married Estelle Blanche Armstrong. They had four children that I am aware of: Buford, Jr, Charles, Francis and Howard.
I do not have additional information about the family, but I do know that there were parts of the Youngblood, Armstrong and McDade families in Fannin Co.