- Greek language--Grammar2
- Gregory I, Pope, approximately 540-6042
- Gregory IX, Pope, approximately 1170-12412
- Gregory, of Nazianzus, Saint2
- Hadith--Commentaries2
- Hadith--Hermeneutics2
- Haggadot--Texts2
- Hagiography2
- Hagiography in literature2
- Hair--Removal2
- Hanukkah2
- Hayākil al-nūr (Suhrawardī, Yaḥyá ibn Ḥabash)2
- Headgear--Religious aspects--Islam2
- Heaven2
- Hebrew language--Alphabet--Religious aspects--Judaism2
- Hebrew literature, Medieval2
- Herbals2
- Hermetism2
- Hieronimus, Fabio2
- Hieronimus, Mario2