Isabelle was born in 1050, the daughter of Guy I de Montlhéry and Hodierne de Gometz-la-Ferté. The place is not known.
She had two marriages/partners. Her first husband was Josselin de Courtenay, who she married in 1065. The place has not been found. Their four known children were Miles (1070-1127), Josselin II (1075-1131), Geoffroy (?-1139) and Hermengarde (c1068-?).
Her second husband was Gautier de Saint-Valéry. They were married, but the date and place have not been found. Their only known child was Bernard II (?-?).
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Isabelle de Montlhéry |
Guy I de Montlhéry |
Milon I de Bray |
Thibault de Montlhéry |
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Élisabeth de Crécy |
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Thibaud de Chevreuse |
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Hodierne de Gometz-la-Ferté |
Guillaume de Gometz |
Guillaume de Gometz |
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Alberède d'Albon |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Birth | 1050 |
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