Abraham Cox (born 1783) was the son of Isaac Cox and the grandson of William Cox 1.
Attached is a pdf of Abraham Cox's will from 1860, found in the South Carolina probate records.
He mentions his deceased daughter Sally Nelson, the late wife of Benjamin Nelson of the state of Alabama; daughter Polly Ashmore, wife of James Ashmore; Nancy Richardson, wife of Jonathan Richardson; Minerva Tollison, wife of Hampton Tollison; daughter Serrelda.
He then mentions son Isaac Cox. "I will my son Isaac Cox five dollars as I have already provided for him."
Then son Samuel Cox; and then son William Cox, deceased; then James Cox.
Wife Jane Cox
my friend David Hoke as executor
December 1, 1857
Abraham Cox [his mark]
"South Carolina Probate Records, Bound Volumes, 1671-1977," images, FamilySearch (https://familysearch.org/ark:/61903/3:1:939L-JDN4-F?cc=1919417&wc=M6NW-829%3A210902701%2C210962201 : 21 May 2014), Greenville > Wills book, 1848-1867, Vol. D > image 143 of 305; citing Department of Archives and History, Columbia.