marks was imposed on him, but was afterwards remitted (ib. v. 530, 569). Henry's treatment of him bore its natural fruits, and in the barons' war we find him on the anti-royalist side. He and others on 4 March 1263 promised to observe any truce granted by ‘dominus Edwardus’ (Royal Letters of Henry III, i. 244). On 13 Dec. of the same year he was one of the barons who agreed to submit to the arbitration of St. Louis (Stubbs, Select Charters, 6th edit. p. 407). In 1264 a Robert de Ros helped to hold Northampton against Henry III (Contin. Gerv. Cant. ii. 234; Wykes, iv. 166). He died between 20 Nov. 1273 and 20 Nov. 1274.
He married Margaret, daughter and sole heiress of Peter de Brus, and left a son Robert, who was still a minor at his father's death.
[Foss's Judges of England, ii. 458; Roberts's Calendarium Genealogicum, i. 211, 230; Baker's Northamptonshire, i. 269; Dudgale's Baronage of England, i. 546; Chron. de Melsa, ii. 128; Annales de Burton, i. 337; Matt. Paris's Historia Major, and Wykes in Annales Monastici, vol. iv. loc. cit.]
ROS, WILLIAM de, second Baron Ros (d. 1317), born before 1260, was son of Robert de Ros, first baron Ros of Helmsley or Hamlake, who died in 1285, and Isabel, daughter and heiress of William d'Albini of Belvoir (Calendarium Genealogicum, i. 358). The father was grandson of Robert de Ros, surnamed Furfan [q. v.], son of William de Ros (d. 1258), by his wife Lucia, daughter of Reginald Fitz-Piers, and nephew of Robert de Ros, baron Ros of Wark (d. 1274) [q. v.] On 24 Oct. 1248 Henry III granted a respite for a debt owing from the father to the crown (Excerpta e Rotulis Finium, ii. 42). In 1276–1277 the first baron Ros went by license on a pilgrimage to St. Edmund of Pontigny (Dep.-Keeper of the Public Records, 46th Rep. App. p. 268); he died in 1285 (Calendarium Genealogicum, i. 358), leaving, besides William, a son Robert, and possibly a third son, John de Ros [q. v.], bishop of Carlisle.
William, the second baron, who acquired Belvoir Castle in right of his mother, first appears as a member of the king's suite in his expedition to Wales in 1277 (Deputy-Keeper of Publ. Rec. 46th Rep. p. 268). In June 1291 he was in Scotland on the king's service (Cal. of Patent Rolls, Edward I, p. 433), and also appeared among the claimants to the Scottish crown on account of the marriage of his great-grandfather, Robert de Ros, called Furfan, with Isabella, daughter of William the Lion (Rymer, new edit. ii. 75; Rishanger, p. 125). When his petition came to be examined on Friday, 7 Nov. 1292, he said his advisers were not present, and received a respite till the morrow. On Sunday, 9 Nov. he withdrew his claim (‘Annales Regni Scotiæ’ in Rishanger, p. 276). In 1296 his cousin, Robert de Ros of Wark, son of Robert de Ros (d. 1274) [q. v.], fled into Scotland and joined the Scots. William asked for reinforcements to defend Wark Castle. These were sent by the king, but were surprised and cut to pieces by Robert (Rishanger, pp. 155–6). William received the confiscated lands of his cousin, and seems to have remained faithful. He was in Gascony in the king's service on 24 Jan. 1297, and deputed the guardianship of Wark Castle to his brother Robert (Stevenson, Documents illustrative of the History of Scotland, ii. 161–2). He joined in the letter of the barons from Lincoln to the pope in 1301, in which they asserted Edward's rights over Scotland, and disputed Boniface VIII's right to interfere (‘Annales Londonienses’ in Stubbs's Chron. of Edw. I and Edw. II, i. 123). On 8 Nov. 1307 he and Robert, earl of Angus, were appointed jointly and severally to defend the county of Northumberland against the incursions of the Scots (Cal. Pat. Rolls, Edw. II, 1307–13, p. 14). On 6 Aug. 1309 he joined in the letter to the pope from Stamford on ecclesiastical abuses (Annales Londonienses, i. 162). Archbishop Greenfield summoned him to a council at York on 1 Jan. 1315 to devise means of resistance to the threatened Scottish invasion after the defeat of Bannockburn, and to another on the Monday after Ascension day of the same year (5 May) (Letters from the Northern Registers, i. 237, 247).
William died in 1317. On 10 June 1309 he gave the manor of Warter to the Augustinian priory of Warter, East Riding of Yorkshire (Cal. Pat. Rolls, Edw. II, 1307–13, p. 161). He seems to have also been a benefactor of the Cistercian abbey of Thornton in Lincolnshire, and of the Augustinian priory of Pentney in Norfolk (Calendarium Genealogicum, ii. 699, 719).
He married Maud, daughter and coheiress of John de Vaux of Walton, Norfolk, leaving three sons—William, John (see below), and Thomas—and three daughters: Agnes, Margaret, and Matilda. He was succeeded by his eldest son, William, third baron Ros (d. 1342), whose son William, fourth baron Ros (1326–1352), by Margaret, daughter of Ralph Neville, accompanied Edward III to France in 1346, was knighted by the king at La Hogue, and died in Palestine in 1352 (Adam de Murimuth, p. 200; Chronicon Galfridi
