I believe Jacob had another sister, born 1821 in South Carolina. In 1850, she was married to James Luther Moore, born 1813, and lived in Gordon County, Georgia. By 1860, she and her family had moved to Eastern Division, Marshall County, Alabama. Lucy's surname appears on several of her children's death certificates. I have assumed that William and Sarah were the parents since they were the only Guntharp's in Gordon County in 1850 in the right age range.