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Bibliography
  1. Keats-Rohan, K.S.B., Domesday People, A Prosopography of Persons Occurring in English Documents 1066-1166. Vol I: Domesday Book. Bury St Edmunds, Suffolk: Boydell Press, 1999. NYPL ARF 03-4178 vol 1. Corrections in Volume II (Domesday Descendants) pp 4-5. Further corrections at http://users.ox.ac.uk/~prosop/domesday-people-corrigenda.pdf Information from this source tagged as [Ref: Keats-Rohan DP p[0-9]*].
  2. Searle, Eleanor Predatory kinship and the creation of Norman power, 840-1066. Berkeley: University of California Press, c1988. NYPL JFE 88-2496. Information from this source tagged as [Ref: Searle PredatoryKinship p[0-9]*].

Sources for birth and parent Information
date:
youngest of three sons [Ref: Keats-Rohan DP p262],
parents:
[Ref: Keats-Rohan DP p262, Searle PredatoryKinship p263]
Research Notes:
1050: went to Apulia as mercenary, with his cousin William de Montreuil [Ref: Keats-Rohan DP p262]



Pedigree of Arnald De Grentmesnil
 /-----Robert De Grentmesnil
Arnald De Grentmesnil
|         /-----Girole De Echafour
 \-----Hawise De Echafour
         |         /-----Thursten De Bastenburgh
          \-----Gisela De Bastenburgh



Descendants of Arnald De Grentmesnil
1. Arnald De Grentmesnil