Viscounts | Titles by Rank
- Viscounts Monckton de Brenchley
- Viscounts Montagu
- Viscounts Montgomery of Alamein
- Viscounts Mordaunt
- Viscounts Morisson de La Bassetière
- Viscounts Mountgarret
- Viscounts Nelson
- Viscounts Newry
- Viscounts Northland
- Viscounts Norwich
- Viscounts Nouel de Tourville de Buzonniere
- Viscounts Ockham
- Viscounts of Abaeté
- Viscounts of Abbéma
- Viscounts of Abrançalha
- Viscounts of Abrantes
- Viscounts of Abrigada
- Viscounts of Acuña
- Viscounts of Agarez
- Viscounts of Agualva
- Viscounts of Aguiar Toledo
- Viscounts of Aguieira
- Viscounts of Ainval
- Viscounts of Air
- Viscounts of Airey
- Viscounts of Alba de Tajo
- Viscounts of Albergaria
- Viscounts of Albergaria de Souto Redondo
- Viscounts of Albi
- Viscounts of Albuquerque
- Viscounts of Alcácer do Sal
- Viscounts of Alcafache
- Viscounts of Alcaide
- Viscounts of Alcântara
- Viscounts of Alcântara-b
- Viscounts of Alcira
- Viscounts of Alcobaça
- Viscounts of Alcochete
- Viscounts of Alenquer
- Viscounts of Alentém
- Viscounts of Aleson
- Viscounts of Alet
- Viscounts of Alferrarede
- Viscounts of Algés
- Viscounts of Alhandra
- Viscounts of Alhos Vedros
- Viscounts of Aliatar
- Viscounts of Alijó
- Viscounts of Aljezur
- Viscounts of Almeida