Individual Details

The Will of Thomas Proctor mentions the heirs of William Procter, deceased son. They had already received their share. A male, age 16-26, was in the household of Thomas Proctor in 1820 - probably William.

The 1810 census is peculiar:
1810, Logan Co Census. Thomas Proctor. 4m -10, 1m 26-45 [Thomas abt 40]; 1f under 10, 1f 26-45 [Rebecca Maxwell m. in 1808]. This census is obviously wrong - there should have been at least four little girls under 10, one boy under 10 (William) - perhaps the boys/girls were reversed. 10 slaves.

Not until 1836 does a William Proctor appear on the Logan tax lists - he was probably a young man with a single poll and one horse. If so, he is too young to be Thomas Proctor's son William. He was listed in 1837, added a slave under the age of 20 in 1838. In 1839 (the last year I abstracted tax records) he had no slaves or horse, but is listed with 130 acres on the Gasper River.
This is more likely the William Proctor, son of Charles, grandson of Hezekiah, who died in 1848:
Logan Co WB H, p.15
William's Will. dated Apr 1848, probated 22 May 1848, mentions Elizabeth, mother, and brothers and sisters. No spouse or children. Gives $1 to each of mother, Hezekiah, James O., Jacob, Charles, Elizabeth Haden. Rest of estate to be divided among 3 younger sisters and 1 young brother; Rebecca, Mary, Martha & Thomas
Exec: Hezekiah Proctor.
Wit: C. W. C. Procter, William Barnett.

But it could also be the William Proctor, son of Benjamin Proctor who was still living in Logan Co in 1850 with his wife Mary Ellen Viers.

No William Proctor is listed in the census in either 1830 or 1840 in Logan Co.

Death

Bef 1841

Father	Maj. Thomas Proctor (1766 - 1841)
Mother	Mary "Polly" O'Neal ( - )
Sibling	Nancy Proctor (1790 - )