John Sydenham 
John's father was John Sydenham and his mother was Joan Popham. His paternal grandparents were Henry Sydenham and Margaret Whitton; his maternal grandparents were Richard Popham and Joan Orchard. He was an only child. He died in 1521.1 General Notes
Son and heir; the second Sydenham of Orchard, Somerset; of Merston/Meryston, Devon.
Sources:
Sydenham, History of the Sydenham Family, 1928, pages 153
Details of John's family with Elizabeth Gambon
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