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Male William St Baron De Leybourne Click to view William St Baron De Leybourne in the family tree

William St Baron De was born before 1242 in Leybourne, Malling, Kent, England.  William St Baron De's father was Roger II De Leybourne and his mother was Idonea De Vipont.  His paternal grandparents were Roger De Leybourne and Eleanor De Turnham; his maternal grandparents were Robert De Vipont and Idonea De Busli.  He was an only child.


William St Baron De's family with Juliana De Sandwich

They had a daughter named Idonea De.

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