William de Ros, 1st Baron de Ros
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William de Ros was the eldest son of Robert de Ros (d. 17 May 1285) of Helmsley, Yorkshire, and Isabel d'Aubigny (c.1233 – 15 June 1301), daughter and heiress of William D'Aubigny of Belvoir, Leicestershire, and granddaughter of William d'Aubigny. He had four brothers and three sisters:
- Sir Robert de Ros of Gedney, Lincolnshire.
- John de Ros.
- Nicholas de Ros, a cleric.
- Peter de Ros, a cleric.
- Isabel de Ros, who married Walter de Fauconberg, 2nd Baron Fauconberg.
- Joan de Ros, who married John Lovell, 1st Baron Lovell.
- Mary de Ros, who married William de Braose, 1st Baron Braose.
On 24 December 1264 William's father, Robert de Ros (d.1285), was summoned to Simon de Montfort's Parliament in London as Robert de Ros, and for some time it was considered that the barony was created by writ in that year, and that Robert de Ros was the 1st Baron Ros. According to The Complete Peerage:
In 1616 the barony of De Ros was allowed precedence from this writ [of 24 December 1264], a decision adopted by the Lords in 1806 (Round, Peerage and Pedigree, vol. i, pp. 249-50); but these writs, issued by Simon in the King's name, are no longer regarded as valid for the creation of peerages.
Accordingly, the barony is now considered to have been created when William de Ros was summoned to Parliament from 6 February 1299 to 16 October 1315 by writs directed Willelmo de Ros de Hamelak.
William de Ros succeeded to the family honours and estates on the death of his mother. He was an unsuccessful competitor for the crown of Scotland, founding his claim on his descent from his great grandmother, Isabel, a bastard daughter of William I of Scotland. He was buried at Kirkham Priory. He was involved in the wars of Gascony and Scotland. He discovered that Robert De Ros, Lord of Werke, intended to give up his castle to the Scots. William notified the king of this, who sent him with a thousand men to defend that place. The place was then forfeited because of the treason of Robert De Ros. William De Ros then took possession of it. William was appointed warden of the west Marches of Scotland.
Through his marriage to Maud de Vaux the patronage of Penteney and Blakeney Priories in Norfolk and of Frestun in Lincolnshire came into the De Ros family. A video relating to relics found belonging to William de Ros and the Battle of Falkirk can be seen on YouTube under the title "braveheart battle camp metal detecting uk".
Marriage and issue
William de Ros married, before 1287, Maud de Vaux (born c.1261), younger daughter and coheiress of John De Vaux, by whom he had four sons and three daughters.
- William de Ros, 2nd Baron de Ros.
- Sir John de Ros (d. before 16 November 1338), who married Margaret de Goushill (d. 29 July 1349).
- Thomas de Ros.
- George de Ros.
- Agnes de Ros, who married firstly Sir Pain de Tibetot, and secondly Sir Thomas de Vere.
- Alice de Ros, who married Sir Nicholas de Meinill. Their daughter, Elizabeth De Meinill, married Sir John Darcy, 2nd Lord Darcy of Knaith.
- Margaret de Ros.
- Debrett's Peerage, 1968, p.347
- Cokayne 1949, p. 96; Richardson I 2011, pp. 69–73; Richardson III 2011, pp. 447–8.
- Richardson III 2011, pp. 447–8.
- Cokayne 1949, p. 95; Richardson III 2011, p. 448.
- Cokayne 1949, p. 95.
- Cokayne 1949, p. 97; Richardson III 2011, p. 448.
- Burke, John (1831). A general and heraldic dictionary of the peerages of England, Ireland, and Scotland, extinct, dormant, and in abeyance. England. Oxford University
- Richardson III 2011, pp. 448–51.
- Cokayne, George Edward (1949). The Complete Peerage, edited by Geoffrey H. White XI. London: St. Catherine Press.
- Richardson, Douglas (2011). Magna Carta Ancestry: A Study in Colonial and Medieval Families, ed. Kimball G. Everingham I (2nd ed.). Salt Lake City. ISBN 1449966373
- Richardson, Douglas (2011). Magna Carta Ancestry: A Study in Colonial and Medieval Families, ed. Kimball G. Everingham III (2nd ed.). Salt Lake City. ISBN 144996639X