House of Castro

• Coat of Arms
• 

  House of Castro
  Lords of Monforte de Lemos
  and Sarria
  Counts of Lemos

• Cadet Branches
• 

  House of Castro de Monsanto
  Lords of Cadaval, Paul de Boquilobo and Penha Verde
  Counts of Monsanto
  Issued from Álvaro Pires de Castro, illegitimate son of Pedro Fernández de Castro and younger brother of Fernán Ruiz de Castro, 3rd Count of Lemos

• 

  House of Castro Osorio
  Lords of Villafranca, Cabrera
  and Ribera
  Counts of Lemos
  Matrilineal branch issued from Isabel de Castro, daughter of Álvaro Pires de Castro, 1st Count of Viana and Arraiolos