House of Foix

• Coat of Arms
• 

  House of Foix
  Counts of Foix
  Viscounts of Castelbon

• 

  House of Foix-Béarn
  Counts of Foix and Bigorre
  Viscounts of Béarn, Castelbon and Cerdanya

• Cadet Branches
• 

  House of Foix-Rabat
  Lords of Saverdun and Fornex
  Barons of Mardogne
  Viscounts of Couserans
  and Massac
  Barons, Viscounts
  and Counts of Rabat
  Marquises of Foix
  Issued from Loup, illegitimate son of Raymond-Roger, Count of Foix

• 

  House of Foix-Castelbon
  Lords of Urgell
  Viscounts of Castelbon
  Issued from Roger-Bernard, 2nd son of Gaston I, Count of Foix

• 

  House of de la Cerda-Medinaceli
  Lords of El Puerto de Santa María
  Marquises of Cogolludo
  Counts and Dukes of Medinaceli
  Issued from Bernal, illegitimate son of Gaston III, Count of Foix
  Assumed name and arms from De la Cerda family as their successors

• 

  House of Foix-Grailly
  Captals de Buch
  Viscounts of Bearn
  Counts of Foix and Bigorre
  Kings of Navarre
  Matrilineal branch issued from Isabella, Countess of Foix

• Personal Arms
• 

  Isabella of Foix
  Countess of Foix and Bigorre
  Viscountess of Béarn and Castelbon