For your line, the tree I found at the Edinburgh Library shows your Elizabeth Miller b. 1809 m. Nathaniel Barton 16 April 1836. This Elizabeth is shown as the daughter of Peter Miller, Jr. and Christena Hisey. Peter, Jr. is shown as the son of Peter Miller, Sr. and Catharine Hollar. There is no sourcing for this information. The tree states that "Peter Miller, Jr. was born in 1788 in Shenandoah County VA. He lived on the farm purchased by his father a few miles from Woodstock, VA. Peter married Christena (Fultz) Hisey who was born in 1788 and died 1877. Peter died 1864. Both are buried in the family cemetery on the farm on road No 763 approx 2.5 miles NW of Woodstock.

My question is: Was this Peter Miller, Sr. in any way related to my Timothy Miller?