Sir William de ROS, Lord of Helmsley
(-Aft 1246)
Lucia Fitz PIERS, Baroness of Ingmanthorpe
(-Aft 1266)
William de ALBINI, Lord of Belvoir
Aubrey (Albreda) BISET
(-Bef 1233)
Robert de ROS of Belvoir
Isabel de AUBIGNY, Heiress of Belvoir
(By 1235-1301)
William de ROS, 1st Baron Ros of Helmsley
(Abt 1255-1316)


Family Links

Maude (Matilde) de VAUX

William de ROS, 1st Baron Ros of Helmsley

  • Born: Abt 1255, Helmsley Castle, North Riding Yorkshire, England
  • Married: Before 1287, Youlton, Easingwold, Yorkshire, England
  • Died: Shortly before 16 Aug 1316

   Research Notes:

Aged 30 years at the death of his father.


A manuscript narrating the foundation of Rievaulx Abbey names Willielmum de Ros as son of Robertum de Roos and his wife Isabellam hæredem D´Albany, adding that he was buried in Kirkham monastery. He was summoned to parliament in 1299, whereby he is held to have become Lord Ros of Helmsley.


William de Ros, 2nd Baron Ros, was summoned to parliament as Baron Ros, of Hamelak, from 23 Jun 1295 to 6 Oct 1315. This nobleman was one of the competitors for the crown of Scotland in 19 Edward I [1296], through his grandmother, Isabel, natural daughter of William the Lion, King of Scotland. He was subsequently engaged in the wars of Gascony and Scotland, and discovering the intention of his kinsman, Robert de Ros, then Lord of Werke, to deliver up that castle to the Scots, he lost no time in apprising the king, who thereupon despatched him with 1600 men to defend that place, but the Scots attacking this force upon its march cut it to pieces; when Edward himself advancing from Newcastle-upon-Tyne soon obtained possession of the fort and appointed Lord Ros its governor--allowing him, during his absence in Gascony, to nominate his brother, Robert, lieutenant. Shortly thereafter, he had a grant of this castle with its appurtenances forfeited by the treason of his before-mentioned kinsman; and for several subsequent years, his lordship was actively engaged in Scotland. In 1 Edward II [1307], he was constituted the king 's lieutenant, between Berwick and the river Forth, and six years afterwards, he was appointed warden of the west marches of Scotland. He married Maud, or Matilda, one of the daughters and co-heirs of John de Vaux, who brought him the manor of Feston and lands in Boston, co. Lincoln.


23 Aug. 1305.— Charter of Wilham de Ros, lord of Hamelak, giving to Belvoir Priory a croft in Beuver, lying between Pecok croft and Long croft, in exchange for two acres of meadow lying in the warren of Beuver at Redmildeheng and for common of pasture in the warren.

28 Dec. 1306. — Charter of William de Ros, lord of Hamelak, permitting the prior and convent of Belvoir to enclose the field called ' le Ryewong,' on the east of the Priory over which he and his predecessors and his neifs of Wlsthorp had enjoyed common of pastm'e throughout the year. This he does out of special affection for John de Stakederne the prior. Moreover, to enlarge the site of the Priory, he gives five acres of his demesne in AVlstorp" adjoining " le Ryewong."

October 1308. — Charter of William de Ros, lord of Belvoir, addressed to John, bishop of Lincoln. For the weal of the souls of Robert his father, and Isabel his mother, and Maud his wife, and master Nicholas his brother, he grants to Belvoir Priory his right (in) and advowson of the church of Wolstorp, providing that it be not defrauded in anything of its proper service, but is canonically served of its own offerings and substance.

Dec. 1309.— Charter of William de Roos, lord of Belvoir, granting to William de Belver, clerk, a messuage in Belver and a selion in the field of Redmild.


15 May 1313, Windsor

Grant, for five years, at the request of queen Isabella, to William de Ros of Hamelak and Matilda his wife of pontage and pavage for the improvement of the town of Boston upon all wares brought for sale into the town.

Calendar of Patent Rolls, Edw. II, vol. 1, p. 585


15 Sep 1314, York

Order to the sheriff of Nottingham to deliver to the executors of the will of Payn Tybotot, tenant in chief, all his goods, taken into the king's hand on account of his debts, to wit, the arrears of his account as justice of Chester and for any other cause; they having found security, to wit, William de Ros of Hamelak of the county of York and William his son of Northumberland, to answer for such debts so far as the goods suffice...

Calendar of Fine Rolls, 8 Edw. II


20 Sep 1316, York

Grant to the executors of the testament of William de Ros of Hamelak, deceased, that they may have free administration of his testament. By K. on the information of W. de Monte Acuto.

Calendar of Patent Rolls, Edw. II, vol. 2, p. 545


16 Aug 1316, York

Order to the escheator beyond Trent to take into the king's hand the lands late of William de Ros of Hamelak, deceased, tenant in chief. The like to the escheator on this side Trent.

20 Aug 1316, York

Order to the escheator on this side Trent to deliver to William de Ros, son and heir of William de Ros of Hamelak, tenant in chief, the lands late of his said father, he having done homage; notwithstanding that inquisitions on the said lands are not yet taken or returned to Chancery.
The like to the escheator beyond Trent.

Calendar of Fine Rolls, 10 Edw. II.

   Marriage Information:

William married Maude (Matilde) de VAUX, daughter of John de VAUX of Walton and Joan, before 1287 in Youlton, Easingwold, Yorkshire, England. (Maude (Matilde) de VAUX was born in Freiston, Lincolnshire, England and died before 1316 in Pentney Priory, Norfolk, England.)


Foundation of Medieval Genealogy, Untitled English Nobility, William de Ros; Sir Bernard Burke, Dormant, Abeyant, Forfeited a nd Extinct Peerages, Burke's Peerage, London, 1883, p. 459, Ros, or Roos, Barons Ros; Calendar of Patent Rolls; Calendar of Fine Rolls; The manuscripts of His Grace the Duke of Rutland, K.G., preserved at Belvoir Castle, vol. iv, pp. pp. 166, 169

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