There are few children who are proven, but there is enough circumstantial evidence to get us a high level of certainty. Otey's will was destroyed during the Civil War, I believe. However, a newspaper article reporting a sale from his estate showedWilliam and Thomas as his executors and since there are men of a good age in the area of Georgia, we can assume they were sons.
In 1796, the will of his wife's father, Bartholomew Stovall named a granddaughter Kitty Prosser.
Jesse Prosser shows up in the same area of Georgia and was probably named after Jesse Stovall, brother of Frances Stovall Prosser.
The book "A History of Deepstep" (Georgia says that Elizabeth Prosser who married Rubin Hickin in 1818 was a daughter. Since Rubin was a Georgia legislator there is a good chance his wife's parentage was known, but I don't remember the author or date
Frances Prosser who married William Wilkins in 1805 in Stokes County, N.C., is shown to be a daughter by her marriage record.
There's a John O. Prosser who married in 1832 in Washington County, Ga., who could have been a son or grandson I'm inclined to the latter.
There could have been more, but that' the best I can do