Athanasius of Alexandria vs theologian

Athanasius of Alexandria and theologian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Athanasius of Alexandria	Yes	No	No	No
theologian	Yes	No	No	No

Athanasius of Alexandria (noun)	theologian (noun)
(Roman Catholic Church) Greek patriarch of Alexandria who championed Christian orthodoxy against Arianism; a church father, saint, and Doctor of the Church (293-373)	someone who is learned in theology or who speculates about theology