HI: You aren't far enough back yet for me to help, but as far as I can tell, most of the Oregon Ledgerwoods were either Joseph Ledgerwood and Rachel Murray's descendants or William Ledgerwood and Delilah Parsons' descendants. I believe that these two men were brothers, but can't prove it.
Joseph was born abt 1797 in East TN; d. 1867 in OR; m. Rachel Murray in TN, had Sarah m. Hiram BOND in Clay Co. MO; John who d. 1862 in Little Rock AK; Margaret, Thomas, William, Joseph, Christopher, Jacob.
William was born 11 Apr 1811 in TN; d. Jul 25, 1848 in Marion Co. OR and is buried in Lone Fir Cemetery. He had John L. Rachel who m. Taylor; Joseph N.; Ella; Martha who m. Anderson, and Mary who m. Henry Udell.