Earldom of Orkney

• Ruling Houses
• 

  House of Magnus

• 

  House of Orkney

• 

  House of Malise
  Maol Íosa V of Strathearn

• 

  House of Bååt
  Erengisle Suneson

• 

  House of Sinclair

• 

  House of Stewart

• 

  House of Hamilton

• 

  House of O'Brien

• 

  House of FitzMaurice

• 

  House of St John