My great-great-grandfather is William Pleasant Dellis. Since your post was quite awhile ago, you may have already found out the following information. William Pleasant's parents are John Milton Dellis Jr (1822-1892) and Lucinda Sims (1826-1855). Their son James Pinkney is my great grandfather on my mother's side. He was one of eight children. John Milton's parents are John Milton Sr. (1790-1860) and Annie Curry (1789-1860). Please let me know if I can help with any other info.
Marcia