Author
- Muḥammad ibn ʻAbd Allāh Iskāfī1
- Muḥammad ibn ʻAbd al-Ḥamīd Usmandī al-Samarqandī1
- Muḥammad ibn ʻUzayr Sijistānī1
- Piccolomini1
- Piccolomo Oltremonti1
- Pietro Parenzi1
- Podestà of Monticchiello (Italy)1
- Priscian1
- Ptolemy1
- Qadi Ayyad1
- Rabanus Maurus1
- Rabīʻah ibn Muḥammad Maʻmarī1
- Raginaldus Collus Rubeus1
- Richard de Geveldale1
- Richard of Middleton1
- Roger Bigod, 2nd Earl of Norfolk1
- Saadia Gaon1
- Sayf al-Din al-Amidi1
- Saʻīd ibn Hibat Allāh ibn al-Ḥusayn1
- Sharif Radhi1