Papa Leo şu anlamlara gelebilir: I. Leo (440-461) II. Leo (682-683) III. Leo (795-816) IV. Leo (847-855) V. Leo (903) VI. Leo (928) VII. Leo (936-939) VIII. Leo (964-965) IX. Leo (1049-1054) X. Leo (1513-1521) XI. Leo (1605) XII. Leo (1823-1829) XIII. Leo (1878-1903) Leo