THE PEERAGE 176182 http://www.thepeerage.com/p17619.htm#i176182
He was the twelfth William Gascoigne in Thoresby's pedigree: "Sir William Gascoigne of Gawthorp, , married Margaret d of Henry Percy 3rd Earl of Northumberland." 
||William Gascoigne XII is a member of royalty, nobility or aristocracy in the British Isles.|
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m. Margaret Percy (Father: Henry Percy, 3rd Earl of Northumberland) abt 25 Jun 1435. Issue: 6 sons, 7 dau.
Justice of the Peace for the West Riding, Yorkshire.
Knight of the Body for Richard III.
1485: Battle of Bosworth.
"Sir William Gascoigne, of Gawthorp, admitted of Corpus Christi, York, in 1473, and died 4 March (?May), 1486/7, seised of the manor of Whatton, co. Notts., of Bentley, co. York, and many others. He had custody of Knaresborough castle, under the Earl of Northumberland."
Fletcher, W.G.D., (1887). Leicestershire Pedigrees and Royal Descents, (pp.162). Clarke and Hodgson. Google Books.
Foster, J. (1874). Pedigrees of the County Families of Yorkshire, (Vol. 1, Part 2).
St-George, R. (1875). The Visitation of Yorkshire in 1584/5 made by Robert Glover, Somerset Herald, and in 1612, (pp. 384-5). Joseph Foster, Ed. London. Gascoigne of Gawthorpe, Sedbury &c.
Harleian Society, (1881). The Visitation of Yorkshire 1563-4 made by William Flower Esq, (Vol 16, pp. 133-136). London.
Ralph Thoresby “Ducatus Leodiensis; or the Topography of the antient and populous Town and Parish of Leedes and parts adjacent in the West Riding of the County of York, 1715. P. 176-178 on Google Books
Lewis, M. (n.d.) our-royal-titled-noble-and-commoner-ancestors.com.
Richardson, D. (2011). Plantagenet Ancestry: A Study In Colonial And Medieval Families, 2nd ed. pp. 141. Google Books
Surtees Society, (1862). "Pedigree of Sir William Gascoyn of Galthrop." Heraldic Visitation of the Northern Counties in 1520 by Thomas Tonge Norroy King of Arms, (Vol 41 pp. 14-5). Durham.
Washington Family Register
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On 26 Nov 2016 at 16:50 GMT Linda Kendrick wrote:
William is 18 degrees from Kevin Bacon, 20 degrees from Cindy Lesure, 19 degrees from Bonnie Thornton and 15 degrees from Queen Elizabeth II Windsor on our single family tree. Login to find your connection.