House of Fiennes
Cadet branch of the House of Reginar
House of de la Planche
Lords of Wendover, Cheriton
and Haversham
Issued from Guillaume, younger son of Guillaume I de Fiennes
English branchHouse of Fiennes-Heuchin
Lords of Heuchin, La Porte
and La Planche
Issued from Robert, younger son of Enguerrand II de FiennesHouse Fiennes of Herstmonceux
Lords of Wartling and Herstmonceux
Barons Dacre of the South
Issued from Gilles, younger son of Enguerrand II de Fiennes
English branch