Family: William de Grandison, Lord Grandison / Sybil Tregoz (F5565)  ^[1] 

• Male William de Grandison, Lord Grandison

  
  

  Birth	Abt 1250
  Death	27 Jun 1335	England
  Burial
  Marriage	21 Jan 1286/87  [1]
  Other Spouse	Jeanne | F8513
  Marriage	Apr 1267 to Feb 1268
  Father	Pierre, Sire de Grandison | F5566 Group Sheet
  Mother	Agnes de Neuchâtel | F5566 Group Sheet

  
  

  Female Sybil Tregoz

  
  

  Birth	1271	Ewyas Harold, Herefordshire, England
  Death	12 Oct 1334	England
  Burial
  Father	John de Tregoz | F5567 Group Sheet
  Mother	Mabel FitzWarin | F5567 Group Sheet

  
  

  Female Agnes de Grandison

  
  

  Birth	1288 to 1290
  Death	1348
  Burial
  Spouse	John de Northwode | F8514
  Marriage

  
  

  Female + Mabilia de Grandison

  
  

  Birth
  Death
  Burial
  Spouse	John Patteshull | F5553
  Marriage

  
  

  Male John de Grandison, Bishop of Exeter

  
  

  Birth	1292
  Death	1369
  Burial

  
  

  Female Katherine de Grandison

  
  

  Birth	Abt 1304	Ashford, Kent, England
  Death	23 Nov 1349	Bisham, Berkshire, England
  Burial
  Spouse	William de Montagu | F6046
  Marriage	1327	England

  
  

• Notes

  Married: Sibyl brought to the marriage the manors of Iden (Sussex) and Lambourne (Berkshire). [1]

  
  

• Sources

  [S1935] Williams, David. "The First Marriage and Issue of William de Grandison, 1st Lord Grandison (d.1335)", (Vowchurch, UK: Foundations: Journal of the Foundation for Medieval GenealogyVolume 10, 2018).