Former Owner
- Robert Mignan2
- Robert Samuel Turner1
- Robert Treswell1
- Robert Walker1
- Robert de Mol1
- Roderick Terry1
- Rodrigo de Abejos1
- Roger North, 2nd Baron North1
- Royal Monastery of Saint Mary of Guadalupe1
- Rudolf Busch1
- Rudolf Hofmeister1
- Rui Garcia1
- Ruth E. Adomeit1
- Sabina Sopheija Behren1
- Sam Schaefler1
- Samuel Addington1
- Samuel Allan1
- Samuel David Luzzatto2
- Samuel Lee1
- Samuel Matzinger1