House of Hainaut

Cadet branch of the House of Flanders

• Coat of Arms
• 

  House of Hainaut
  Counts of Hainaut

• 

  House of Hainaut
  Counts of Flanders
  Assumed arms from House of Alsace as successors in Flanders

• 

  House of Hainaut
  Latin Emperors in
  Constantinople

• Cadet Branches
• 

  House of Roeulx
  Lords of Roeulx, Morlanwelz
  and Écaussinnes
  Issued from Arnould, younger son of Baudouin II, Count of Hainaut

• 

  House of Werchin
  Lords of Werchin, La Longueville, Thy-Le-Château and Walincourt
  Barons of Cysoing
  Seneschals of Hainaut
  Issued from Guillaume, illegitimate son of Baudouin IV, Count of Hainaut

• Personal Arms
• 

  Philippe I de Namur
  Count and Marquis of Namur
  2nd son of Baudouin V, Count of de Hainaut

• 

  Henry of Flanders
  Emperor of Constantinople
  3rd son of Baudouin V, Count of de Hainaut
  Later arms variant