Nielsen Hayden genealogy
Family: Robert de Ros / Isabel d'Aubeney (F3900)
m. Bef 17 May 1244-
Father | Male
Robert de Ros
Born of Helmsley, Yorkshire, England 
Died 17 May 1285 Buried Kirkham Priory, Yorkshire, England Married Bef 17 May 1244 [1, 2, 3] Father William I de Ros | F3385 Group Sheet Mother Lucy fitz Peter | F3385 Group Sheet
Mother | Female
Isabel d'Aubeney
Born Abt 1233 Died 15 Jun 1301 Buried Newstead Priory, Lincolnshire, England Father William IV d'Aubeney | F148 Group Sheet Mother Isabel | F148 Group Sheet
Child 3 | Female
+ Mary de Ros
Born Died Bef 23 May 1326 Buried Spouse William de Brewes | F10067 Married Bef 1272
Child 4 | Male
+ Robert de Roos
Born of Wyville, Lincolnshire, England Died Bef 3 Feb 1311 Buried Spouse Erneburge | F12959 Married
Child 5 | Male
+ William III de Ros
Born Abt 1255 of Helmsley, Yorkshire, England Died Between 12 May 1316 and 16 Aug 1316 Buried Kirkham Priory, Yorkshire, England Spouse Maud de Vaux | F5875 Married Bef 1284
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Sources - [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S53] The Magna Charta Sureties, 1215: The Barons Named in the Magna Charta, 1215, and Some of Their Descendants Who Settled in America During the Early Colonial Years by Frederick Lewis Weis. Fifth edition, with additions and corrections by Walter Lee Sheppard, Jr. and William R. Beal. Baltimore: Genealogical Publishing Company, 1999.
- [S1016] Medieval English Ancestors of Robert Abell by Carl Boyer III. Santa Clarita, California, 2001.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.