Author
- Jacob ben David ben Yom Tov1
- Jacob ben Jacob, ha-Kohen, -approximately 12701
- Jacob ben Reuben ibn Zur1
- Jacob ibn Habib1
- Jakob Reifmann1
- Jewish Community of Amsterdam, Netherlands1
- Jewish Community of Padua, Italy1
- Jewish community of unidentified city, Italy1
- Joachim Heinrich Campe1
- Johannes de Sacrobosco1
- Jonathan Eybeschutz1
- Joseph Albaradani1
- Joseph Nasi1
- Joseph Trani1
- Joseph ben Gorion1
- Joseph ben Judah ibn Aknin1
- Joseph ben Moses Sarfati1
- Joseph ibn Abitur1
- Joseph ibn Migash1
- Joshua ben Israel Benveniste1