Baldwin I de Mortaigne 
Baldwin I's father was Everard III de Mortaigne and his mother was Gertrude de Montaigu. He was an only child. He died before May 21st, 1208.1 General Notes
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They had a son and a daughter, named Everard (Radoul) IV and Marie.
1 Pullen010502.FTW
Further sources/citations:
Ahnentafel for Margery Arundell, The Plantagenet Ancestry @ p 191
Further sources/citations:
Ahnentafel for Margery Arundell, The Plantagenet Ancestry @ p 191
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