- Rajab1
- Reading1
- Real property1
- Religions1
- Religious ethics1
- Repentance--Judaism1
- Requesens, Antonio de'1
- Requesens, Berengario de'1
- Requesens, Bernardo de'1
- Requesens, Giuseppe de'1
- Ricchi, Raphael Immanuel ben Abraham Ḥai, 1688-17431
- Riddles, Persian1
- Riyāḍ al-ṣāliḥīn (Nawawī)1
- Saladin, Sultan of Egypt and Syria, 1137-11931
- Saros cycle1
- Saʻdī Chalabī, Saʻd Allāh ibn ʻĪsá, -1538 or 1539. ḥāshiyah ʻalá Anwār al-tanzīl1
- Saʻīdī, Mīr Abū al-Fatḥ ibn Makhdūm, active 16th century. Ḥāshiyah ʻalá Sharḥ al-Dawwānī1
- Science, Medieval1
- Scribes, Jewish1
- Sea monsters1