Encyclopedias, Almanacs, Transcripts, and Maps
- Leo Baeck Institute
- Leo I, Byzantine Emperor
- Leo I, Pope, St.
- Leo II, Pope, St.
- Leo III, Byzantine Emperor
- Leo III, Pope, St.
- Leo III°
- Leo IV, St. Pope
- Leo IX, Pope, St.
- Leo Luke, St.
- Leo Marsicanus
- Leo of Assisi (Brother Leo)
- Leo of Cava
- Leo of St. John
- Leo of Vercelli
- Leo Thaumaturgus, St.
- Leo V, Byzantine Emperor
- Leo V, Pope
- Leo VI, Byzantine Emperor
- Leo VI, Pope