Pope John Paul I vs John Paul I

Pope John Paul I and John Paul I both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pope John Paul I	Yes	No	No	No
John Paul I	Yes	No	No	No

As nouns, Pope John Paul I and John Paul I are synonyms defined as:

Pope John Paul I and John Paul I: the first Pope to assume a double name; he reigned for only 34 days (1912-1978)

Other synonyms of Pope John Paul I include Albino Luciano.

Pope John Paul I (noun)	John Paul I (noun)
the first Pope to assume a double name; he reigned for only 34 days (1912-1978)	the first Pope to assume a double name; he reigned for only 34 days (1912-1978)