House of St Clair

• Coat of Arms
• 

  House of St Clair
  Lords of Herdmanston and Polwarth
  Sometimes also referred as Sinclair of Herdmanston

• 

  House of St Clair
  Lords of Ravenscraig and Dysart
  Lords Sinclair
  Adopted the arms of Sinclair upon inheriting Barony of Sinclair

• Cadet Branches
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  House of St Clair-Erskine
  Barons Loughborough
  Earls of Rosslyn
  Matrilineal branch