Former Owner
- Antonio Laserna1
- Antonio Marino de Caboga1
- Antonio Pallavicini Gentili1
- Antonio de Bonius1
- Antonio di Matteo di Giovanni Foresi da Bibbiena1
- Antonius Mensing1
- Apostolo Zeno1
- Archer Milton Huntington1
- Archibald Primrose, 5th Earl of Rosebery1
- Arno M. Voynich1
- Arnold Jansen op de Haar1
- Arnold Mettler1
- Artemesia Piccolomini1
- Arthur Annesley, 1st Earl of Anglesey1
- Arthur Griffith1
- Arthur Haddaway1
- Arthur Lee Loeb1
- Arthur Liddell, 5th Baron Ravensworth1
- Arthur M. Ellis1
- Arthur M. Elliz1