Sibyl Marshal 
Sibyl was born about 1191 in Pembroke, Pembrokeshire, Wales. Sibyl's father was William Marshal , 3rd Earl of Pembroke and her mother was Isabel de Clare , Countess of Pembroke. Her paternal grandparents were John "The Marshal" FitzGilbert and Sibyl de Salisbury; her maternal grandparents were Richard Strongbow de Clare , 2nd Earl Pembroke and Eve (Aoife) MacMurrough. She had a brother and four sisters, named William, Maud, Eva, Isabel and Joan. She was the second oldest of the six children. She died before 1238.-
Ancestor Pedigree Chart
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- b.~ 1075 in Somerset, England d.< 1130
- b.~ 1106 in Pembroke, Pembrokeshire, Wales d.1165
- b.~ 1090 in Pembroke, Pembrokeshire, Wales
- b.1146 in Pembroke, Pembrokeshire, Wales d.14 May 1219 in Caversham Manor, England
- b.1100 in Chitterne, Wiltshire, England d.1147 in Salisbury, Wiltshire, England
- b.~ 1127 in Salisbury, Wiltshire, England d.03 Jun
- b.1100 in Kempsford, Gloucestershire, England d.1147 in Near The Choir, Braenstoke, Wiltshire, England
- b.~ 1191 in Pembroke, Pembrokeshire, Wales d.< 1238
- b.21 Sep 1100 in Tunbridge, Kent, England d.6 JAN 1147/48 in Carmarthen, Carmarthenshire, Wales
- b.~ 1130 in Tunbridge, Kent, England d.20 Apr 1176 in Dublin, Leinster, Ireland
- b.~ 1049 in Beaumont-le-Roger, Eure, Normandy, France d.05 Jun 1118 in As a monk at Abbey of Preaux, Normandy, France
- b.~ 1098 in Leicester, Leicestershire, England d.6 JAN 1147/48 in Carmarthen, Carmarthenshire, Wales
- b.~ 1081 in Valois now Oise, Picardy, France d.<Jul 1147 in Priory of Lewes, Sussex, England
- b.~ 1172 in Pembroke, Pembrokeshire, Wales d.1220 in Pembroke, Pembrokeshire, Wales
- b.1100 in Leinster, Ireland d.1 JAN 1170/71 in Ferns, Leinster, Ireland
- b.~ 1141 in Ireland d.> 1186 in Waterford, Ireland
- b.1114 in Leinster, Ireland d.1191
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Sibyl and William III de were married in a religious ceremony before May 14th, 1219 in 1st wife. They had five daughters named Isabel de, Agnes de, Maud (Matilda) de, Eleanor de and Joan de.
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Children
Isabel de Ferrers
Isabel de was born about 1220 in Derby, Derbyshire, England. She died before November 26th, 1260 in Torre Mohun, Devonshire, England.
Agnes de Ferrers
Agnes de was born about 1222 in Ferrers, Derbyshire, England. She died on May 11th, 1290 in Greyfriars, Scarborough, Yorkshire, England.
Eleanor de Ferrers
Eleanor de was born about 1232 in Derby, Derbyshire, England. She died before October 26th, 1274 in Leeds Priory, Kent, England.
Joan de Ferrers
Joan de was born about 1233 in Derby, Derbyshire, England. She died before October 1267 in Addington, Surrey, England.
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