I found your post very interesting - although I must disagree with there being a link between the genealogy as listed for Christian Roop 1733-1810 and Isaac N. Roop, except perhaps further back across the ocean in the 1600s. Many years ago, Wendell Roop did further research on Isaac Roop which bears this out.But that is all too much to go into here, we can discuss that another time.
What I would like to go into, is your grandfather Thomas Spencer Roop.I was recently tying up some loose ends, googled his name, and came upon your post. Very fortunate indeed!I will touch base, briefly, but please contact me when you can.
First, the records I have come across show that Thomas Spencer Roop married Bertha Wilkens, and that they had three sons: Vincent, from Bertha's previous marriage, Robert R. Roop, born about 1913, and William S. Roop, born about 1919. Perhaps you can correct the information that I have, and fill in the blanks.
Thomas was the sixth of seven children, the youngest son of four (of which one died in infancy), of Henry J. Roop and Gustina M. (Backenstoe) Roop (Roop street, that you mentioned in Highspire, gets its name from Henry, and as a matter of fact, much of Highspire is built on what was once Henry's farm, the Pleasant View Dairy). Henry J. Roop 1845-1930 married Gustina M. Backenstoe in 1867 Children: Hervin Ulysses Roop 1868-1955 Harry Backenstoe Roop 1870-? Jacob Franklin Roop 1871-1872 Adela F. Roop 1873-? Sadie A. Roop 1875-? William S. Roop 1877-? Minerva E. Roop 1882-? (all of Henry's children graduated from Lebanon Valley College, William's oldest brother, Hervin, served as president for about 10 years).
In a nutshell: Henry was a son of Christian Roop 1808-1866; Christian was a son Jacob Roop 1782-1875 (he is known for being the United Brethren minister); Jacob was a son of Jacob Roop 1740/1745-1826 and Addie Poorman (Jacob and his brothers, Christian and John served in the 4th Battalion of the Lancaster County militia during the Revolutionary War). Jacob and his brother, John, married sisters.I am descended from John and Maria Poorman. Jacob was a son of Jacob Roop 1720-1792 and Barbara Greiner. The ancestral graveyard that you mentioned is still there in Highspire, except the Roop family graves have been reinterred at the Chambers Hill cemetery a few miles away.