Leo (discretiva)
Leo significare potest:

Animalia
Leo, animal, Panthera leo.

Res naturales
Leo, constellatio in caelo
Leo Minor, sidus
Leo est signum zodiacum.

Homines
Leo (nomen), nomen hominum

Imperatores Romani Orientales
Leo I (457–474)
Leo II (474)
Leo III Isaurianus (717–741)
Leo IV (775–780)
Leo V Armenius (813–820)
Leo VI Sapiens (886–912)

Pontifices Catholici
Sanctus Leo I 
Sanctus Leo II 
Leo III
Sanctus Leo IV 
Leo V 
Leo VI 
Leo VII 
Leo VIII 
Sanctus Leo IX
Leo X 
Leo XI
Leo XII 
Leo XIII

Alii
Leo Landau, physicus Sovieticus
Leo Samuel Olschki, bibliopola ac editor Germanico-Italicus
Leo Tolstoi, scriptor Russicus
Leo Trotzki, vir publicus Sovieticus

Res aliae
LEO (abbreviatio pro Anglice Link Everything Online et Law Enforcement Official) est pagina in interrete.
Leo Belgicus
Leo est bestia heraldicum