Jacquet, E., [38]

Jamshid, [56]

Jehan Certain, [59]

Jetons, [58], [117]

Jevons, F. B., [76]

Johannes Hispalensis, [48], [88], [124]

John of Halifax, see Sacrobosco

John of Luna, see Johannes Hispalensis

Jordan, L., [58], [124]

Joseph Ispanus (Joseph Sapiens), [115]