Robert was probably the eldest of Henry's many illegitimate children. He was born before his father's accession to the English throne, either during the reign of his grandfather William the Conqueror or his uncle William Rufus. He is sometimes and erroneously designated as a son of Nest, daughter of Rhys ap Tewdwr, last king of Deheubarth, although his mother has been identified as a member of "the Gay or Gayt family of north Oxfordshire", possibly a daughter of Rainald Gay of Hampton Gay and Northbrook Gay in Oxfordshire. Rainald had known issue Robert Gay of Hampton and Stephen Gay of Northbrook. A number of Oxfordshire women feature as the mothers of Robert's siblings. Robert may have been a native of Caen or he may have been only Constable and Governor of that city, jure uxoris. Robert's father had contracted him in marriage to Mabel FitzHamon, daughter and heir of Robert Fitzhamon, but the marriage was not solemnized until June 1119 at Lisieux. His wife brought him the substantial honours of Gloucester in England and Glamorgan in Wales, and the honours of Sainte-Scholasse-sur-Sarthe and Évrecy in Normandy, as well as Creully. After the White Ship disaster late in 1120, and probably because of this marriage, in 1121 or 1122 his father created him Earl of Gloucester.
Family
Robert and his wife Mabel FitzHamon married in 1119, and they had seven children:
William FitzRobert : succeeded his father as 2nd Earl of Gloucester
There is evidence in the contemporary source, the Gesta Stephani, that Robert was proposed by some as a candidate for the throne, but his illegitimacy ruled him out: This suggestion cannot have led to any idea that he and Stephen were rivals for the Crown, as Geoffrey of Monmouth in 1136 referred to Robert as one of the 'pillars' of the new King's rule. The capture of King Stephen at the Battle of Lincoln on 2 February 1141 gave the Empress Matilda the upper hand in her battle for the throne, but by alienating the citizens of London she failed to be crowned Queen. Her forces were defeated at the Rout of Winchester on 14 September 1141, and Robert of Gloucester was captured nearby at Stockbridge. The two prisoners, King Stephen and Robert of Gloucester, were then exchanged, but by freeing Stephen, the Empress Matilda had given up her best chance of becoming queen. She later returned to France, where she died in 1167, though her son succeeded Stephen as King Henry II in 1154. Robert of Gloucester died in 1147 at Bristol Castle, where he had previously imprisoned King Stephen, and was buried at St James' Priory, Bristol, which he had founded.
In popular culture
Robert of Gloucester is a figure in many of the novels by Ellis Peters in the Cadfael Chronicles where he is seen as a strong moderating force to his half-sister. His efforts to gain the crown for his sister by capturing King Stephen and her own actions in London are part of the plot in The Pilgrim of Hate. His capture by Stephen's wife Queen Mathilda is in the background of the plot of An Excellent Mystery. The exchange of the imprisoned Robert for the imprisoned Stephen is in the background of the plot of The Raven in the Foregate. Robert's travels to persuade his brother-in-law to aid Empress Maud militarily in England is in the background of the novel The Rose Rent. His return to England when Empress Maud is trapped in Oxford Castle figures in The Hermit of Eyton Forest. Robert's return to England with his young nephew Henry, years later the king succeeding Stephen, is in the background of the plot of The Confession of Brother Haluin, as the battles begin anew with Robert's military guidance. Robert's success in the Battle of Wilton leads to the death of a fictional character, part of the plot of The Potter's Field. In the last novel, he is a father who can disagree with then forgive his son Philip. In that last novel, Brother Cadfael speculates on the possibly different path for England if the first son of old King Henry, the illegitimate Robert of Gloucester, had been recognised and accepted. In Wales of that era, a son was not illegitimate if recognized by his father, and to many in the novels, Robert of Gloucester seemed the best of the contenders to succeed his father. Robert is also a central character in Sharon Penman's 1995 novel When Christ and His Saints Slept. He was also central in the struggle during The Anarchy as portrayed in Ken Follet's 1989 novel The Pillars of the Earth and in the 2010 mini-series of the same name.
