Pope Leo IX vs Leo IX

Pope Leo IX and Leo IX both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pope Leo IX	Yes	No	No	No
Leo IX	Yes	No	No	No

As nouns, Pope Leo IX and Leo IX are synonyms defined as:

Pope Leo IX and Leo IX: German pope from 1049 to 1054 whose papacy was the beginning of papal reforms in the 11th century (1002-1054)

Other synonyms of Pope Leo IX include Bruno, Bruno of Toul.

Pope Leo IX (noun)	Leo IX (noun)
German pope from 1049 to 1054 whose papacy was the beginning of papal reforms in the 11th century (1002-1054)	German pope from 1049 to 1054 whose papacy was the beginning of papal reforms in the 11th century (1002-1054)