William De III St. Omer 
William De III was born about 1120 in St. Omer, France. William De III's father was William De II St. Omer and his mother is Melisende De Picquigny. His paternal grandfather was William De I St. Omer and his paternal grandmother is Aganitrude; his maternal grandfather is Arnoul. He was an only child. He died in 1170.-
Ancestor Pedigree Chart
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- b.~ 1000 in St Omer, Pas-De-Calais, France d.1063
- b.~ 1030 in St Omer, Pas-De-Calais, France d.1083
- b.~ 1056 in St Omer, Pas-De-Calais, France d.> 1097
- b.~ 1070 in St Omer, Pas-De-Calais, France d.1128
- b.~ 1056
- b.~ 1090 in St Omer, Pas-De-Calais, France d.~ 1143
- b.~ 1070 in Bruges, France
- b.~ 1120 in St. Omer, France d.1170
- b.~ 1013 in Picquigny, Picardy, France d.1085
- b.~ 1040 in Picquigny, Picardy, France d.1085
- b.~ 1020 in France
- b.1070 in Picquigny, Picardy, France
- b.~ 1090 in Picquigny, Picardy, France
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They had a son named William De IV.
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Children
William De IV St. Omer
William De IV was born about 1150 in St. Olmer, France. He died in 1192 in Holyland.
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