My grandmother was Elma D. Patterson. She was born & died in Iowa. Her father was John Randolph Patterson, born in Green Co. PA & died in Iowa. His father was James, b. in Washington Co. PA & d. in Green Co. PA. His father was John, b. in York, PA & d. in Wash. Co. PA. John's father was Robert, born in NJ & moved at age 1 with his family to Wash. or York Co. PA. Most of my info comes from the book "My Kith & Kin" by Burke & Woodrow. The book follows 2 Patterson lines, one from Washington Co. PA (my ancestors) & one from Greene Co. PA. The Washington Co. Pattersons were of "pure English descent". The Greene Co. Pattersons were of Scots-Irish descent, immigrated to VA & then moved to Greene Co. PA after the Revolutionary War. The 2 families were not related until 2 Greene Co. sisters married 2 Washington Co. brothers.
I have done the Ancestry DNA, but don't know how to use that to determine if I'm related to you.
Deb Schwirtz