Sibyl of Montgomery was born circa 1072 to Roger I de Montgommery (1020-1094) and Mabel de Bellême (1025-1082) and died circa 1119 of unspecified causes. She married Robert Fitzhamon circa 1088 JL . Notable ancestors include Charlemagne (747-814). Ancestors are from France, Germany, Belgium.
|Offspring of Sibyl of Montgomery and Robert Fitzhamon|
|Mabel of Gloucester (c1095-1156)||1095||1156|| Robert, 1st Earl of Gloucester (1090-1147)|
|Hawisa of Gloucester|| |
|Daughter of Gloucester|| |
|Daughter of Gloucester|