Bertha de Gavre 
Bertha's father was Bertrand (Rasse IV) de Gavre and her mother was Ida (Domnison) de Chievres. She was an only child.General Notes
This site is made-up of my own family tree, plus contributions from many others who have shared their research, as well as downloads from from the internet. Not everything has been varified. It should be used with caution, but is a good place to start.
They had a son named Eustace III.
Sources/Citations
Ahnentafel for Margery Arundell, The Plantagenet Ancestry @ p 191, {Pullen010502.FTW}
Ahnentafel for Margery Arundell, The Plantagenet Ancestry @ p 191, {Pullen010502.FTW}
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