William de Grandeson 
William was born in Cassington, Oxfordshire, England or near Lake Neufchatel,Switzerland. William's father was Pierre I de Grandison and his mother was Agnes de Neuchatel. His paternal grandparents were Ebal IV de Grandison and Beatrice de Genevre; his maternal grandparents were Ulric III de Neuchatel and Yolande de Urach Arberg. He had a brother named Amedee. He died on June 27th, 1335 in Gascony, France.-
Ancestor Pedigree Chart
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*There are earlier generations for the ancestor(s) indicated. See their page(s) for details (click name)
- b.~ 1087 in Grandson, Waadt, Switzerland d.04 May 1130
- b.~ 1110 in La Sarraz, Waadt, Switzerland d.1158 in Jerusalem, Palestine
- b.~ 1091 in Grandson, Waadt, Switzerland
- b.~ 1133 in La Sarraz, Waadt, Switzerland d.> 1177
- b.Bet 1154 and 1158 in Grandson, Waadt, Switzerland d.Aft 26 Jan 1234/35
- b.~ 1134 in La Sarraz, Waadt, Switzerland d.1158
- b.~ 1190 in Neuchatel, Switzerland d.Bet 1244 and 1259
- b.1012 in Geneva, Switzerland d.Bet 1061 and 1080
- b.~ 1050 in Geneva, Switzerland d.1125
- b.~ 1025 d.> 1050 in Geneva, Geneva, Switzerland
- b.~ 1100 in Geneva, Switzerland d.26 Jun 1178
- b.< 1060 d. in Geneva, Geneva, Switzerland
- b.~ 1086 d.> 1100
- b.< 1137 in Geneva, Geneva, Switzerland d.> 1235
- b.~ 1086
- b.Bet 1110 and 1126 in Cuiseaux, Saone-et-Loire, France d. in Geneva, Geneva, Switzerland
- b.~ 1088
- b.Bet 1244 and 1264 in Cassington, Oxfordshire, England or near Lake Neufchatel,Switzerland d.27 Jun 1335 in Gascony, France
- b.< 1099 d.1130
- b.< 1130
- b.< 1180 d.1191
- b.< 1165
- b.~ 1150 in Urach, Baden, Germany d.1225
- b.~ 1194 in Neuchatel, Switzerland d.> 1244
- b.~ 1160 d.1230 in Urach, Baden, Germany
- b.< 1180 in Urach, Baden, Germany d.> 1194
- b.~ 1158 in Urach, Baden, Germany d.10 May 1239
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‌William and Sybil were married in a religious ceremony about 1285 in Donyatt, Somersetshire, England. They had two sons and three daughters, named Piers, John, Agnes, Mabilia and Katherine.
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Children
Piers de Grandeson
Piers was born in 1287 in Ashperton, Herefordshire, England. He died at the age of 71 on August 10th, 1358.
Agnes de Grandeson
Agnes was born about 1289 in Bletsoe, Bedfordshire & Lydlard Tregoz, England. She died on December 4th, 1348.
Mabilia de Grandeson
Mabilia was born about 1294 in Ashperton, Herefordshire, England. She died in 1350.
Katherine de Grandeson
Katherine was born about 1304 in Ashford, Hertfordshire, England. She died on November 23rd, 1349 in Bisham, Berkshire, England.
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