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Female Mary De Baliol Click to view Mary De Baliol in the family tree

Mary De was born about 1247 in Bernard Castle, Gainford, Durham, England.1   Mary De's father was John De Baliol and her mother was Dervorgilla De Galloway.  Her paternal grandparents were Hugh De Baliol and Cecily De La Fontaine; her maternal grandparents were Alan De Galloway and Margaret Huntingdon. She had five brothers and four sisters, named Hugh De, Alexander De, John, Alan De, William De, Cecilia De, Eleanor De, Ada De and Margaret De.  She was the fifth oldest of the ten children.1 

1 phelps1609.FTW
Further source/citation:
World Family Tree Vol. 16, Ed. 1 @ Tree #1609