Wm. S. Cordle/Caudill & wife Louiza, NC/IL/MO

I have copies of two letters written in 1855 and 1860 from this couple to his sister Pharaby and her husband Aaron Woodruff.The 1855 letter is also from Nathan M. Cordel/Caudill, whom I take to be another brother.Can anyone identify the parents of William, Nathan, and Pharaby?I will be very happy to male copies of these two letters to any descendants of William and Louiza who may be out there.Thanks!