- John Waller1
- John de Beauchesne1
- Joseph ben Abraham Finzi1
- Joseph ben Isaac Gallico1
- Josā Puṣkar1
- Jośipañcyanadikara, Śivarāma1
- Judah ben Jacob1
- Jundī, Arslān ibn Muḥammad ʻAlī, active 19th century1
- Jundī, Aḥmad ibn ʻAbd al-Dāʼim, active 19th century1
- Jundī, Aḥmad, active 19th century1
- Justinus of Master Stephanus1
- Juʻaydī, ʻAbd al-Raḥmān ibn Muḥammad Saʻīd, active 19th century1
- Jyotiṣa, Dhuḍirāja (Son of Kṛṣṇa Jyotiṣa)1
- Jñodekhāśa1
- Jābir ibn Ibrāhīm, active 16th century1
- Jābir ibn Sālim Shihāb al-Baghdādī1
- Jāgeśvara1
- Jīlānī, Ibn Muḥammad Yūsuf, active 17th century1
- Jīzī, Aḥmad ibn Nāṣir, active 17th century1
- Kalaṅkara Keśava1