Matilda FitzRoy, Abbess of Montivilliers

{{Short description|Illegitimate daughter of Henry I of England}}

{{other people||Matilda FitzRoy (disambiguation){{!}}Matilda FitzRoy}}

{{Use dmy dates|date=April 2022}}

Maud, Abbess of Montivilliers, was a natural daughter of Henry I of England by an unknown mistress.Geoffrey H. White, ‘ "Associates" and Illegitimate Children of King Henry (I) Beauclerc of England’, Appendix D of The Complete Peerage, Volume XI, 1949. She is not to be confused with Isabel, another illegitimate daughter of Henry I by his mistress Isabel de Beaumont (c. 1102 – c. 1172), herself a sister of Robert de Beaumont, 2nd Earl of Leicester.

Maud (or Mathilda) was a half-sister of the Empress Matilda, who agreed to work with her.Kathleen Thompson, ‘Affairs of State: the illegitimate children of Henry I’, Journal of Medieval History, 29 (2003), pp. 129–151. She may have valued her company and advice.{{citation needed|date=May 2013}}

Matilda became the abbess of the Montivilliers Abbey, and for that reason is best known as Maud of Montivilliers.