By William L King, 1906, taken from Arch Cantiana

John, Baron Fiennes, kinsman of William the Conqueror; constable of Dover and Warden of the Cinque Ports (see Dict de la Noblesse par de la Chenaye-Desbois et Badier, Paris, 1866). He had a son:

James de Fiennes. He had a son:

John de Fiennes. He had a son:

Sir Ingelram de Fiennes, who was slain at the battle of Acres. He married Sybil, called de Tyngrie, Lady of Clapham, Surrey. They had a son:

Sir William de Fiennes. He married Agnes de Danmartin, sister of Reynold and Simon Danmartin, Counts of Boulogne and Ponthieu. They had a son:

Sir Ingelram de Fiennes, who died in 1269. He married a sister of Bartholemew Hampden. Their second son was:

Sir Giles de Fiennes, who married Sybil, the daughter of William Folliol of Old Court, Sussex. They had a son:

Sir John de Fiennes, who died in 1331. He married Joanne, the daughter of John Jourdain, Forester of Windsor, who died in 1339. They had a son:

Sir John de Fiennes, who died in 1351. He married Maude, the daughter of John de Moncear of Hurstmonceux. They had a son:

Sir William de Fiennes, who died in 1360. He was sheriff of Surrey and Sussex. He married Joan de Saye.