Leo (nomen)
Leo est praenomen masculinum.

Homines 
 Leo Africanus
 Leo Baptista Albertus
 Leo Daudet
 Leo Delibes
 Leo Gontrandus Damas
 Leo Frobenius
 Leo Landau
 Leo Marsicanus
 Leo Samuel Olschki
 Leo Renier
 Leo Tolstoj
 Leo Trotski
 Leo Varadkar

Leo est etiam nomen pontificale quod tredecim papae sibi imposuerunt:

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

Praenomina