Editing William the Conqueror (section)

== Family and children ==
William and his wife Matilda had at least nine children.<ref name=Douglas393 /> The birth order of the sons is clear, but no source gives the relative order of birth of the daughters.<ref name=DNB />

# [[Robert Curthose|Robert]] was born between 1051 and 1054, died on 10 February 1134.<ref name=Douglas393>Douglas ''William the Conqueror'' pp. 393–395</ref> Duke of Normandy, married [[Sybilla of Conversano|Sybilla]], daughter of [[Geoffrey, Count of Conversano]].<ref name=RobertDNB>Thompson "Robert, duke of Normandy" ''Oxford Dictionary of National Biography''</ref>
# [[Richard, son of William the Conqueror|Richard]] was born before 1056, died around 1075.<ref name=Douglas393/>
# [[William II of England|William]] was born between 1056 and 1060, died on 2 August 1100.<ref name=Douglas393/> King of England, killed in the New Forest.<ref name=RufusDNB>Barlow "William II" ''Oxford Dictionary of National Biography''</ref>
# [[Henry I of England|Henry]] was born in late 1068, and died on 1 December 1135.<ref name=Douglas393/> King of England, married [[Matilda of Scotland|Edith]], daughter of [[Malcolm III of Scotland]]. His second wife was [[Adeliza of Louvain]].<ref name=Handbook35/>
# [[Adeliza]] (or Adelida,<ref name=Adelida /> Adelaide<ref name=Handbook35>Fryde, et al., ''Handbook of British Chronology'', p. 35</ref>) died before 1113, reportedly betrothed to Harold Godwinson, probably a nun of Saint Léger at Préaux.<ref name=Adelida>Van Houts "Adelida" ''Oxford Dictionary of National Biography''</ref>
# [[Cecilia of Normandy|Cecilia]] (or Cecily) was born before 1066, died 1127, Abbess of [[Abbey of Sainte-Trinité, Caen|Holy Trinity, Caen]].<ref name=Douglas393/>
# Matilda<ref name=DNB>Bates "William I" ''Oxford Dictionary of National Biography''</ref><ref name=Adelida /> was born around 1061, died perhaps about 1086.<ref name=Handbook35/> Mentioned in the [[Domesday Book]] of 1086 as a daughter of William.<ref name=Douglas393/>
# [[Constance of Normandy|Constance]] died 1090, married [[Alan IV, Duke of Brittany]].<ref name=Douglas393/>
# [[Adela of Normandy|Adela]] died 1137, married [[Stephen, Count of Blois]].<ref name=Douglas393/>
# (Possibly) Agatha, the betrothed of [[Alfonso VI of León and Castile]].{{efn|[[William of Poitiers]] relates that two brothers, Iberian kings, were competitors for the hand of a daughter of William, which led to a dispute between them.<ref name=Salazar>Salazar y Acha "Contribución al estudio" ''Anales de la Real Academia'' pp. 307–308</ref> Some historians have identified these as [[Sancho II of Castile]] and his brother [[García II of Galicia]], and the bride as Sancho's documented wife [[Alberta, Queen of Castile|Alberta]], who bears a non-Iberian name.<ref name=Reilly>Reilly ''Kingdom of Leon-Castile'' p. 47</ref> The anonymous ''vita'' of Simon de Crépy instead makes the competitors [[Alfonso VI of León]] and [[Robert Guiscard]], while [[William of Malmesbury]] and [[Orderic Vitalis]] both show a daughter of William to have been betrothed to Alfonso "king of Galicia" but to have died before the marriage.  In his ''Historia Ecclesiastica'', Orderic specifically names her as Agatha, "former fiancee of Harold".<ref name=Salazar/><ref name=Reilly/> This conflicts with Orderic's own earlier additions to the ''[[Gesta Normannorum Ducum]]'', where he instead named Harold's fiance as William's daughter, Adelidis.<ref name=Adelida/> Recent accounts of the complex marital history of Alfonso VI have accepted that he was betrothed to a daughter of William named Agatha,<ref name=Salazar/><ref name=Reilly/><ref>Canal Sánchez-Pagín "Jimena Muñoz" ''Anuario de Estudios Medievales'' pp. 12–14</ref> while Douglas dismisses Agatha as a confused reference to known daughter Adeliza.<ref name=Douglas393/> [[Elisabeth van Houts]] is non-committal, being open to the possibility that Adeliza was engaged before becoming a nun, but also accepting that Agatha may have been a distinct daughter of William.<ref name=Adelida/>}}

There is no evidence of any illegitimate children born to William.<ref name=Bastards59>Given-Wilson and Curteis ''Royal Bastards'' p. 59</ref>