Author
- Gilbert de La Porrée3
- Gorakṣanātha Heiliger3
- Grand Inquisitor of Spain3
- Gregorio Dati3
- Gregory of Nazianzus3
- Guillaume de Lanicia3
- Haimo of Auxerre3
- Hamdullah Hamdi3
- Hasan Sezai Gülşenî3
- Henry Hakesalt3
- Henry Suso3
- Hubert de Burgh, 1st Earl of Kent3
- Isaac Newton3
- Ismāʻīl ibn Ibrāhīm İsfendiyaroǧlu3
- Ivo of Chartres3
- Jacobus de Cessolis3
- Jacobus de Teramo3
- Jaghmini3
- Jalaluddin al-Mahalli3
- James of Milan3