- Būnī, Aḥmad ibn ʻAlī, -12251
- Būstān (Saʻdī)2
- Būṣīrī, Sharaf al-Dīn Muḥammad ibn Saʻīd, 1213?-1296? Hamzīyah fī madḥ Khayr al-Barīyah1
- Būṣīrī, Sharaf al-Dīn Muḥammad ibn Saʻīd, 1213?-1296? Muḍarīyah2
- Būṣīrī, Sharaf al-Dīn Muḥammad ibn Saʿīd, 1213?-1296? Hamzīyah fī madḥ Khayr al-Barīyah1
- Bṛhaspati (Hindu deity)1
- Cabala309
- Cabala and Christianity1
- Cacciaguerra, Renaldus1
- Caesar, Julius6
- Caesarius, of Arles, Saint, 470?-5421
- Cafsuto, Moisè Vita, active 18th century1
- Cairo Genizah56
- Cakchikel language1
- Cakchikel language--Grammar1
- Calandra, Paolo del1
- Calendar11
- Calendar reform1
- Calendar, Batak1
- Calendar, Chinese3