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William feuded with de Marisco Marshall

William was born before 1234. William's father was Richard 3rd Earl of Pembroke Lord Justice of Ireland Marshall and his mother was Gervase le Dinant. His paternal grandparents were Earl William the Protector de Marshall and Isabel De Clare. He was an only child.

Ancestor Pedigree Chart
- Gilbert Marshall ^*
  - b.~  1056
  
  Gilbert FitzRobert Master Marshal of the king's household under King Henry Marshall
  - d.<  1130
  
  John FitzGILBERT le MARECHAL; `the Marshall'; (of Rockley)
  - b.1106 in Normandy, France d.1164
  
  Geoffrey Marescall Venuz ^*
  
  Miss De Venuz
  
  Earl William  the Protector de Marshall
  - b.1146 d.14 May 1219
  
  Sibile Sibyl De Vere  Deever D'evereaux
  
  Richard 3rd Earl of Pembroke Lord Justice of Ireland Marshall
  - b.1191 d.16 Apr 1234
  
  Earl Gilbert FitzRichard of Hereford De Clare ^*
  - b.<  1066 d.<  1117
  
  Earl Gilbert the Marshall of Pembroke De Clare Knt
  - b.<  1100 d.~  1149
  
  Adeliza De Clairmont ^*
  
  Earl Richard FitzGilbert Stongbow of Pembroke De Clare
  
  Count Robert De of Meulan Beaumont ^*
  
  Elizabeth Isabel De Beaumont
  
  Countess Elizabeth De Vermandois ^*
  - b.~  1081
  
  Isabel De Clare
  
  King Dermot of Leinster MacMurrough
  
  Aoife MacMurrough
  
  Dearvorgala O' Moore
  
  William feuded with de Marisco Marshall
  - b.<  1234
  
  Gervase le Dinant
  
  ^*There are earlier generations for the ancestor(s) indicated. See their page(s) for details (click name)