Sir Robert de Ros (before 1237 – 13 May 1285) was an English nobleman.
Family
Robert de Ros of Helmsley, Yorkshire, born c. 1225, was the son of Sir William de Ros (died c. 1264/5) and Lucy FitzPeter, the daughter of Peter FitzHerbert and Alice FitzRoger. He had five brothers, Sir Peter, Sir William, Sir Alexander, Sir Herbert, and John, and two sisters, Lucy and Alice.
He was the grandson of Sir Robert de Ros, one of the twenty-five barons who guaranteed the observance of Magna Carta, and Isabel of Scotland, an illegitimate daughter of William the Lion, King of the Scots, by Isabel, a daughter of Robert Avenel.
Career
On 24 December 1264 he 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:
<blockquote>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.
Marriage and issue
Robert de Ros married, Bef. 17 May 1246, Isabel d'Aubigny (c.1233 – 15 June 1301), granddaughter (her father, William, died in 1247) and heiress of William d'Aubigny (died 1236) of Belvoir, Leicestershire, by his second wife, Isabel, by whom he had five sons and three daughters:
- William de Ros, 1st Baron de Ros.
- Sir Robert de Ros of Gedney, Lincolnshire, who married a wife named Erneburge.
- 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.
- Emlin de Roos, married to William de Thany.