Saint Olav vs Olav II

Saint Olav and Olav II both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Olav	Yes	No	No	No
Olav II	Yes	No	No	No

As nouns, Saint Olav and Olav II are synonyms defined as:

Other synonyms of Saint Olav include Olaf II, Olaf II of Norway, Saint Olaf, St. Olaf, St. Olav.

Saint Olav (noun)	Olav II (noun)
King and patron saint of Norway (995-1030)	King and patron saint of Norway (995-1030)