William I de Percy, Earl of Caux

Abt 1088 - Yes, date unknown

• Name	William I de Percy  [1, 2, 3]
  Suffix	Earl of Caux
  Birth	Abt 1088	Caux, Normandie, France
  Gender	Male
  Death	Yes, date unknown
  Person ID	I16522	My Genealogy
  Last Modified	16 May 2026

  
  

  Father	Alan de Percy, Earl of Caux,   b. Abt 1050, Caux, Normandie, France d. Bef Dec 1135 (Age < 85 years)
  Relationship	natural
  Mother	Emma de Gaunt,   b. Abt 1071, Folkingham, Lincoln, England
  Relationship	natural
  Marriage	Abt 1087	Caux, Normandie, France   [3]
  Family ID	F4403	Group Sheet  |  Family Chart

  
  

  Family	Alice de Ros,   b. Abt 1090, Alnwick, Northumberland, England d. Yes, date unknown
  Marriage	Abt 1111	Caux, Normandie, France   [3]
  Children	1. Serlo de Percy,   b. Abt 1117, Whitby, North Riding, Yorkshire, England  [Father: natural]  [Mother: natural]   2. Alan de Percy,   b. Abt 1120, Whitby, North Riding, Yorkshire, England  [Father: natural]  [Mother: natural]   3. Richard de Percy,   b. Abt 1122, Whitby, North Riding, Yorkshire, England  [Father: natural]  [Mother: natural]   4. Robert de Percy,   b. Abt 1124, Whitby, North Riding, Yorkshire, England  [Father: natural]  [Mother: natural]   5. Sir. William de Percy, Baron,   b. 1112, Whitby, North Riding, Yorkshire, England d. 1175 (Age 63 years)  [Father: natural]  [Mother: natural]
  Family ID	F4395	Group Sheet  |  Family Chart
  Last Modified	16 May 2026

  
  

• Sources

  [S18] Personal knowledge of Kirk Larson, [ADDRESS FOR PRIVATE USE]\. [S19] The Church of Jesus Christ of Latter-day Saints, database, \i FamilySearch\i0, (Name: (http://www.familysearch.org);). [S31] Edmundson, Isaac & Cokayne, George Edward, "Complete baronetage: Microprint ed.", (Name: (Gloucester : A. Sutton, 1983.), ISBN: 0-86299-004-1; LC CALL NO.: CS424.C681983; LCCN: 87-173374 //r914;), 3:269, 929.7/2 ED: 19.