William de Vescy, of Alnwick, Northumberland, and Malton, Yorks, by Agnes, daughter of William de Ferrers, 5th Earl of Derby of the 1138 creation. [Burke's Peerage]

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WILLIAM DE VESCY, son and heir, was a minor at his father's death. In January 1217/8 the custody of the whole de Vescy fee, with the heir and his marriage, was granted to William (Longespée), Earl of Salisbury, the King's uncle, to whom Margaret, Eustace's widow, was ordered to deliver her son, 13 November 1218. William had livery of his inheritance, 16 May 1226, when he was about to marry the Earl's daughter. He was knighted, circa May 1229, and accompanied Henry III's expedition to Brittany in 1230, being granted a protection while remaining in the King's service overseas, 15 September. In 1232 and 1234 he was forbidden to attend tournaments at Blyth, Northampton and Cambridge. He was deputed to escort King Alexander and Queen Joan of Scotland to the English court in 1235, and again in August 1237. In 1240 he was ordered not to retain in his service Siward, sometime professed in the order of Friars Preachers, nor to prevent his arrest. In 1242 he went with the King to Gascony. In December 1244. he was deputed, with the abbots of Alnwick and Byland, to receive the oath of Patrick and Walter Comyn, Earls in Scotland, to clear themselves towards the King. Next year he was in the Welsh campaign. On 30 May 1253 he had a protection, going with the King to Gascony. He was the founder of the Carmelite priory of Hulne, in Northumberland.

He married, 1stly, shortly after 16 May 1226, Isabel, daughter of William (LONGESPEE), EARL OF SALISBURY, by Ela, only daughter and heir of William (OF SALISBURY, styled also FITZPATRICK), 2nd EARL OF WILTSHIRE, styled always EARL OF SALISBURY. She died s.p. and was buried in Alnwick Abbey. He married, 2ndly, before 1244, Agnes, 1st daughter of William (DE FERRERS), 5th EARL OF DERBY, by his 1st wife, Sibyl, sister and, in her issue, coheir of Anselm, 9th EARL OF PEMBROKE, 3rd daughter of William (MARSHAL), 4th EARL OF PEMBROKE. He died in Gascony, shortly before 7 October 1253, and was buried at Watton Priory, co. York. His widow died 11 May 1290, and was buried in the Greyfriars, at Scarborough. [Complete Peerage XII/2:276-8, (transcribed by Dave Utzinger)]

• Married: AFT 16 MAY 1226 in 1st wife ⁴

1. Sarah de VESCY b: ABT 1236 in Alnwick Castle, Northumberland, England

• Married: BEF 1244 in 2nd wife ⁵

1. John de VESCY , of Alnwick, Sir b: 18 JUL 1244 in Alnwick Castle, Northumberland, England
2. William 1st Baron de VESCY , of Alnwick, Sir b: 19 SEP 1245 in Alnwick Castle, Northumberland, England
3. Agnes de VESCY b: ABT 1247 in Alnwick Castle, Northumberland, England
4. Juliana de VESCI , Heiress of Harlaston b: ABT 1253 in Alnwick Castle, Northumberland, England

1. Title: Burke's Peerage & Baronetage, 106th Edition, Charles Mosley Editor-in-Chief, 1999
   Page: 2884
2. Title: Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Ltd, 2000
   Page: XII/2:276-278
   Text: had livery of his lands on 16 May 1226
3. Title: Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Ltd, 2000
   Page: XII/2:276-278
4. Title: Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Ltd, 2000
   Page: XII/2:277
5. Title: Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Ltd, 2000
   Page: XII/2:277-278