Sosa :46,571,160
  • Born about 1237 - Trusbutt, & Belvoir, Helmsley, Leicestershire, England
  • Deceased 17 May 1285 - (bur.) Kirkham Priory, Yorkshire, England,aged about 48 years old


 Spouses and children


Individual Note

Name Prefix: Sir
{Magna Carta}

{#profile:Prefix} {#profile:RealName} de{#profile:LastNameAtBirth} was a descendant of Magna Carta suretybaron '

{British Isles 742-1499}

==Lineage to Magna Carta Surety==: MCSWeis, Frederick Lewis, Th.D., [ The Magna Carta Sureties, 1215] (Genealogical Publishing Co., Inc., Baltimore, MD, 5th Edition - 1999). Line 116-1, p. 52 is the father of
is the father of
Sir Robert de Ros Is the father of

Sir Robert de Ros married who was herself a Magna Carta Surety descendant. Their descendants therefore descend from two Magna Carta Sureties: and .

Father Sir William de RoosDouglas Richardson, Magna Carta Ancestry, 2nd Edition, Vol. III, p. 445-446. b. c 1193, d. 1258 or 1264
Mother Lucia FitzPiersDouglas Richardson, Royal Ancestry, Vol. IV, p. 486-487 d. a 29 Sep 1266
Sir Robert de Roos was born circa 1223 at Trusbutt, & Belvoir, Helmsley, Leicestershire, England.

===Marriage and Children===
He married Isabel d' Aubeney, daughter and sole heiress of Sir William d' Aubeney and Isabel, between 5 June 1243 and 17 May 1244; They had5 sons (Sir William, 1st Lord Roos; Sir Robert; John; Nicholas, a cleric; & Peter, a cleric) and 3 daughters (Isabel, wife of Walter, 2nd Lord Fauconberge; Joan, wife of John, 1st Lord Lovel; & Mary, wife of Sir William, 1st Lord Brewes).Douglas Richardson, Royal Ancestry, Vol. I, p. 531-532

===Death and Burial===
Sir Robert de Roos died on 17 June 1285; His body was buried at Kirkham, Yorkshire; his viscera were buried before the high altar of Belvoir Priory, Leicestershire.Douglas Richardson, Magna Carta Ancestry, 2nd Edition, Vol. III, p. 447.


  • Isabel d' Aubeney b. c 1233, d. 15 Jun 1301


  • Joan de Roos d. 13 Oct 1348
  • Sir Robert de Roos d. c 3 Feb 1311
  • John de Roos
  • Nicholas de Roos
  • Mary de Roos b. c 1250, d. c 23 May 1326* Sir William de Roos, 1st Lord Roos, Governor of Wark Castle b. c 1255, d. 6 Aug 1316
  • Isabel de Roos b. c 1256

M.P. 1261, 1265. Summoned to Montfort's Parliament in 1264 as Baron de Ros of Belvoir Castle. By modern doctrine, this summons is not held to have created a hereditary dignity, but nevertheless the precedence of his son's title is taken from this date, making Ros the premier barony.
In 1258 he was appointed chief commissioner of Herefordshire to inquire into excesses there. In that same year he was summoned for service against the Welsh and the Scots. He sided with Simon de Montfort in 1263-64 and was holding Northampton under the younger Simon when the King took it in April, but within several days he had safe conduct to meet with the King. On 24 December he was summoned to Monfort's parliament; but these writs, issued by Simon in the King's name, are no longer regarded as valid for the creation of peerages. On 18 May 1265 Prince Edward (the future King Edward I) escaped from his custody at Herefordto Wigmore Castle, with help of Roger de Mortimer. Robert surrenderedGloucester Castle to the Prince on 29 June. Montfort was slain and his rebellion quashed at the Battle of Evesham, and ten days later Robert received a full pardon at the insistence of Prince Edward. In November of 1276 he was one of the magnates, who, in council at Westminster,gave judgement against Llewelyn, and was summoned for servive in the consequent campaign.
By his marriage he became Lord of Belvoir. On July 3, 1257, Ros obtained from Henry III a grant of the free warren in the lordship of Belvoir, by which the boundary was determined. In 1258, he was actively employed in Scotland, in delivering King Alexander III of Scotland out of the hands of his rebellious subjects; and at Chester, in resisting the hostile invasions of Llewelyn the Last. In the same year, he and his lady Isabel had a controversy with the Prior and Convent of Belvoir,relative to the right of presentation to the Church of Redmile (near Bottesford), which was amicably compromised by their relinquishing thepatronage to the convent, for a certain compensation. In 1261 he obtained from the king the grant of a weekly market, to be held at Belvoir, on Tuesday; and of an annual fair on the feast of St John the Baptist, to continue for three days. In 1264, he was one of the insurgent barons who defeated Henry III at the battle of Lewes, and took him and the prince prisoner, confining them in Hungerford Castle. In 1264, de Ros was summoned to the parliament, which was called by the barons in the king's name. He died in 1285, and was buried at Kirkham Priory.


  Photos and archival records

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Robert Ros ca 1172-ca 1227 Isabella Dunkeld ca 1170-ca 1240 Peter FitzHerbert ca 1185-/1235 Alice Warkworth ca 1185-/1225

William Ros /1200-/1264 Lucy FitzPiers 1204-1266/

Robert Ros ca 1237-1285