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Family:
Bibliography
  1. Keats-Rohan, K.S.B., Domesday Descendants, A Prosopography of Persons Occurring in English Documents 1066-1166. Vol II: Pipe Rolls to Cartae Baronum. Bury St Edmunds, Suffolk: Boydell Press, 2002. NYPL ARF 03-4178 vol 2. Corrections at http://users.ox.ac.uk/~prosop/domesday-descendants-corrigenda.pdf Information from this source tagged as [Ref: Keats-Rohan DD p[0-9]*].
  2. Sanders, I. J., English Baronies, A Study of Their Origin and Descent 1086-1327. Oxford: Clarendon Press, 1960. Information from this source tagged as [Ref: Sanders Baronies p[0-9]*].

Sources for birth and parent Information
father:
[Ref: Sanders Baronies p106]
Sources for death Information
date:
before 1242 [Ref: Sanders Baronies p106]
by 1242 [Ref: Keats-Rohan DD p671]
Research Notes:
Baron of Ros [Ref: Sanders Baronies p106]

inherited the Barony of Ros from father [Ref: Sanders Baronies p106]

d.s.p; heir was Richard, possibly brother and heir [Ref: Keats-Rohan DD p671, Sanders Baronies p106]



Pedigree of William De ROS, Baron Of Ros
                            /-----Geoffrey De ROS, Baron Of Ros
                   /-----Geoffrey De ROS, Baron Of Ros
          /-----William De ROS, Baron Of Ros
         |         \-----Sibil De ARSIC
 /-----William De ROS, Baron Of Ros
William De ROS, Baron Of Ros



Descendants of William De ROS, Baron Of Ros
1. William De ROS, Baron Of Ros