Leo, the names of 13 Popes: L. I., St., Pope from 410 to 461; L. II., St., Pope from 682 to 683; L. III., Pope from 795 to 816; L. IV., Pope from 847 to 855; L. V., Pope in 903; L. VI., Pope from 928 to 929; L. VII., Pope from 936 to 939; L. VIII., Pope from 963 to 965; L. IX., St., Pope from 1049 to 1054; L. X., Pope from 1513 to 1521; L. XI., Pope in 1605; L. XII., Pope from 1823 to 1829; L. XIII., Pope since 1878. Of these only the following deserve mention:—
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Leo * Leo I.