Eustachie De Montreuil

Eustachie was born about 1000.  Eustachie's father was Bellay II De Montreuil and her mother was Grécia Du Plessis-Macé.  Her paternal grandparents were Bellay Ier De Montreuil and Adélaïs De Saumur; her maternal grandfather was Macé Ier Du Plessis-Macé. She had a brother and a sister, named Giraud Ier Le Bon and Aenor.  She was the second oldest of the three children.  She died in 1038.

They had a daughter named Marguerite.