Ermengarde de Montaigu 
Ermengarde de was born about 1063 in Montaigu, Nantes, Anjou, France. Ermengarde de's father was Guillaume (Roger) de Montaigu. She was an only child. She died after 1123.
They had a son named William de.
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Children
William de Pierrepont
William de was born about 1085 in Hurst, Suffolk, England. He died in 1154 in Hurst, Suffolk, England.
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