William Fitz Patric de Washington

http://thepeerage.com/p32196.htm#i321952

Washington Irving version of the origin of the Washington family, from his "Life of George Washington" (vol. i. 1855), augmented by later research into the origin of the Nevilles of Raby. (Parentage is by no means consensually agreed on, and there are chronological issues.)

The Bolden Book was a survey made in 1183 by/for the Bishop of Durham:

"Willus de Hertburn habet Wessyngton (except ecclesia et terra ecclesie partinen) ad excamb, pro villa de Herteburn quam pro hac quietam clamavit: Et reddit 4 L., Et vadit inmagna caza cum 2 Leporar. Et quando commune auxillum venerit debet dare 1 Militem ad plus de auxilio, &c. Collectanea Curiosa. voll. ii, p. 80." (Version quoted by Irving - there are apparently 4 surviving copies of the MS, all with slight differences.) It boils down to William de Hertburn holding the manor of Wessington from the Bishop with payment of 4 pounds a year, two greyhounds for a great hunt, and one man-at-arms (variant: one mark) for communal defense.

Note: Sir William must have been at least 21, and probably older, by 1183. "Probably older" because he was already a landholder in his own right and exchanged those lands for Wessyngton-on-Tyne. It is unknown whether he had only one wife (Dowager Countess Margaret), or whether he was a widower with (one or two) sons when (and if) he married her.