William De+ Mandeville 
William De+ was born about 1060 in Great Waltham, Essex, England. William De+'s father is Geoffroi I De+ Mandeville and his mother is Athelaise De+ Balthes. He had a sister named Beatrice De+. He was the older of the two children. He died about 1130 in England.General Notes
SOURCES: LDS FHL Ancestal File # (familysearch.org)
AWTP:
"Thorns among the roses" Holly Forrest Tamer holly_tamer@@yahoo.com (who cites: "Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom" by G.E. Cokayne, Sutton Publishing Ltd, 2000 and "Ancestral Roots of Certain American Colonists, 7th Edition, by Frederick Lewis Weis, additions by Walter Lee Shippard Jr., 1999, among other great sources). Has also provided life highlights, which is much appreciated.
They had a son and a daughter, named Geoffroi De+ and Beatrix De+.
-
Children
Geoffroi De+ Mandeville
Geoffroi De+ was born about 1102 in New Temple Church, Essex, England. He died on September 16th, 1144 in Mildenhall, Suffolk, England. He was buried in New Temple Church, Holborn, Suffolk, England.
Beatrix De+ Mandeville
Beatrix De+ was born in 1105. She died at the age of 92 on April 19th, 1197 in Rickling, Essex, England.