The profile states his father was William. The citations state his father was Humphrey. Wasn't William his brother and Humphrey his father?
The Rhode Island Historical Magazine, Volume 1 edited by Henry Edward Turner, Risbrough Hammett Tilley Page 38 http://books.google.com/books?id=ZZg6AQAAMAAJ
John Barker "Married Elizabeth, daughter of Thomas Hill.*"
"*Thomas Hill was son of Humphrey and Agnes (Bird) Hill,"
Burke's genealogical and heraldic history of the landed gentry, Volume 1 By John Burke. Pg. 573
HUMPHREY HILL, of Buntingdale, who lived in the reigns of HENRY V. and HENRY VI. He m. Agnes, dau. and co-heir of John Bird, and cousin and heiress of David de Malpas, by whom he had issue,
III. Thomas, who m. Margaret, dau. of Thomas Wilbraham, of Woodhey, in Cheshire, and had issue,
Burke's genealogical and heraldic history of the peerage, baronetage and ... Pg. 1014
Humphrey Hill, of Buntingale, ... m. Agnes, dau, and co-heir of John bird, and had three sons, 1. William ... 2. Ralph ... 3. Thomas, whose son was the celebrated Sir Rowland Hill, lord mayor of London.
