Author
- Juan Perez Barahona1
- Juan Valenzuela Velázquez1
- Juan Vicente de Güemes, 2nd Count of Revillagigedo1
- Juan de Foxá1
- Juan de Mena1
- Juan de Mongaston1
- Juan de Torquemada1
- Juan de Zumárraga1
- Judah Leib Ben Zeev1
- Judah ben Saul ibn Tibbon1
- Julius III1
- Jñānamṛtapata1
- Kalim Kashani1
- Kamal Khujandi1
- Kamalakara1
- Kamāl al-Dīn Turkumānī1
- Kamāl al-Dīn ibn Āsāyish Shirwānī1
- Kamāl aldaayn albakry1
- Kapila1
- Kara Fazlî1