There is some confusion as to the father of Valentine Peyton. Some say it was Craven who married Ann West, and others say John who married Seth Harrison, daughter of Burr Harrison.
"Fauquier County in the Revolution", p 195, shows "Valentine Peyton, 1755-1781. There are three contemporary Valentine Peytons, all Captains, according to the record. Ashby's 1st Lt., was a son of John and Seth (Harrison Peyton of Fauquier. He may have been the Valentine Peyton who died without issue during the seige of Charleston, S.C.
As Valentine mentions his "beloved brother Burr Peyton" in his will, it seems that he must be the son of John. Part of the confusion my be that on page 295 of the "History of Albemarle County, VA" it states: "John Peyton son of Craven Peyton, of Loudoun County, was an officer in the Revolutionary army and during the was sent to Fluvanna County to purchase supplies. Three nephews, sons of this brother Valentine, joined him there, Craven, Robert and John..." However, in view of the fact that this Valentine Peyton had a brother Burr Peyton it seems he is misidentified in the "History".
56. CAPTAIN VALENTINE6 PEYTON (Craven,5 Valentine,4 Henry,3 Henry,2 Henry1), of Prince William and Loudoun counties, Va., b. --; d. Jan. or Feb., 1786; will dated Dec. 20, 1785; pro. Prince William county, Feb. 6, 1786; m. (I.) --, MARGARET GWATKIN, Prince William county; (II.) --, SARAH or SALLY (???). From "History of Albemarle County, VA" page 295 John Peyton, son of Craven Peyton, of Loudoun County, was an officer in the Revolutionary army, and during the war was sent to Fluvanna County to purchase supplies. Three nephews, sons of his brother Valentine, joined him there, Craven, Robert and John. The nephews settled in Milton, and Robert and John died unmarried at an early age. Craven, inheriting the property of his brothers, and likely that of his uncle, who also died unmarried, became the possessor of a large estate. He purchased from the family of Bennett Henderson more than eleven hundred acres surrounding Milton, which in 1811 he sold to Mr. Jefferson. He also acquired from his father-in-law nearly a thousand acres on both sides of the Rivanna, including the old Lewis homestead of Monteagle, which he made his home. He married Jane Jefferson, daughter of Charles Lilburn Lewis and his wife Lucy, a sister of Mr. Jefferson. He died in 1837. His children were Margaret, the second wife of Isham R. Jefferson, Valentine, Lucy, the wife of James W. Eskridge, Mary, the wife of William C. Eskridge, and Charles Lewis. The family removing to other places, most of them to the Valley, the estate passed into other hands. Charles Lewis settled at Richlands, Greenbrier County, where he died a few years ago, and his son, Rev. Charles W. Peyton is preaching as a Presbyterian minister in Texas.
Captain Peyton's will names wife Sally P. and children Craven, Prudence, John and Robert, all minors. Executors, wife Sally Peyton and brother Burr Peyton. Witness, Harrison Peyton, &c. In the inventory of his estate he is styled "Captain Valentine." In the audited account of his estate, May 1786, Col. Ewell is paid 18s. for a coffin for Capt. Val'e Peyton. He was a vestryman of Shelborn Parish, Loudoun Co., 1770, and in 1785 Trustee for the estate of John Tyler, with James Gwatkin.
https://www.geni.com/people/Valentine-Peyton/6000000028529154933