Ellie Wood Keith Genealogy

Robert De Mortain, Earl of Cornwall

Male Aft 1038 - 1090  (~ 51 years)


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  • Name Robert De Mortain 
    Suffix Earl of Cornwall 
    Born Aft 1038  Avranches, Normandie, France Find all individuals with events at this location 
    Gender Male 
    History Source :
    "Robert, Count of Mortain, 1st Earl of Cornwall (died 1095) was a Norman nobleman and the half-brother of William I of England. Robert was the son of Herluin de Conteville and Herleva of Falaise (who was also William's mother) and was full brother to Odo of Bayeux. The exact year of Robert's birth is unknown (perhaps ca. 1038), although it is generally thought that Odo was the elder of the two, and that Robert was probably not more than a year or so younger than his sibling: there is considerable doubt about the year of Odo's birth.

    Count of Mortain
    His name first appears in or about the year 1049 when he was made Count of Mortain in the Cotentin, in place of one William Warlenc, who had been banished by Duke William on suspicion of treason. The suspicion is that this William Warlenc was a grandson of Duke Richard I and therefore a potential rival to William the Bastard.
    Five years later Robert was to be found supporting William against the French King Henri I's invasion of Normandy, although he does not appear to have taken part in the famous victory of the battle of Mortemer. He was however present at the council of Lillebonne in 1066, held to discuss the Duke's planned conquest of England when Robert agreed to contribute 120 ships to the invasion fleet. Robert in all probability fought at Hastings, yet he is not one of the proven Companions of William the Conqueror, as he was not recorded as having been such by contemporary chroniclers, who made notice of only 15 out of the many hundreds undoubtedly there. Later sources however do place him at William's side at the Battle of Hastings where he commanded a company of knights from the Cotentin, although he seems to have played no heroic role at the battle. When granting the monastery of St Michael's Mount to the Norman monastery on the Mont-Saint-Michel Robert recorded that he had fought under the banner of St Michael ("habens in bello Sancti Michaelis vexillum").

    Lands granted by William the Conqueror
    Robert's contribution to the success of the invasion was clearly regarded as highly significant by William who awarded him a large share of the consequent spoil. He was granted the rape of Pevensey in Sussex and a total of 549 manors scattered across the country; 54 in Sussex, 75 in Devon, 49 in Dorset, 29 in Buckinghamshire, 13 in Hertfordshire, 10 in Suffolk, 99 in Northamptonshire, 196 in Yorkshire, and 24 in other counties. However the greatest concentration of his landed wealth was in Cornwall (where he held a further 248 manors at the time of the compilation of the Domesday Book, together with the castles of Launceston and Trematon) although these Cornish estates were not granted to him until after 1072 when Brian of Brittany decided to return home. His position of authority in the south west has therefore led many to consider him as the Earl of Cornwall, although it appears uncertain whether he was formally created as such.  [1
    Died 8 Dec 1090  Normandie, France Find all individuals with events at this location 
    Buried Abbaye de Grestain, Normandie, France Find all individuals with events at this location 
    Person ID I347  Ellie Wood Keith
    Last Modified 15 May 2017 

    Father Herluin De Conteville,   b. Abt 1001, France Find all individuals with events at this location,   d. Abt 1066, France, age 65 Find all individuals with events at this location  (Age ~ 65 years) 
    Mother Arlette De Falaise,   b. Abt 1003, Falaise, Normandie, France Find all individuals with events at this location,   d. Abt 1050, Grestain, Normandie, France, age 47 Find all individuals with events at this location  (Age ~ 47 years) 
    Family ID F180  Group Sheet  |  Family Chart

    Family 1 Mathilde De Montgommery,   b. Normandie, France Find all individuals with events at this location,   d. Abt 1085, France Find all individuals with events at this location 
    Children 
    +1. Emma De Mortain,   b. Abt 1058, Gloucestershire, England Find all individuals with events at this location,   d. 1126-1127, France Find all individuals with events at this location  (Age ~ 69 years)
    Last Modified 15 May 2017 
    Family ID F171  Group Sheet  |  Family Chart

    Family 2 Mathilde De Montgommery,   b. Normandie, France Find all individuals with events at this location,   d. Abt 1085, France Find all individuals with events at this location 
    Married Bef 1066 
    Children 
    +1. Agnes de Mortain
    Last Modified 22 Mar 2018 
    Family ID F1502  Group Sheet  |  Family Chart

  • Sources 
    1. [S13] Genealogy-Knights from Continental Europe to England'Ireland, Patrick R. Knight, (http://knight-france.com/geneal/names/1336.htm), http://knight-france.com/geneal/names/1365.htm.