Sir William de Plumpton1
M, d. 1362
|Father||Sir Robert de Plumpton|
|Mother||Lucy de Ros|
William de was born in Spofforth Parish, West Riding of Yorkshire, England, at the Ville de Plumpton. William married Alice Byanfiz, daughter of Sir Henry Byanfiz and Cecelia de Plumpton , Heir of the Seneschals, before 14 April 1322. William departed this life in 1362.
- [S179] Levi B. Chase, A Genealogy and Historical Notices of the family of Plimpton or Plympton in America and of Plumpton in England.