Olav II vs St. Olav

Olav II and St. Olav both are nouns.

Word	Noun	Adjective	Verb	Adverb
Olav II	Yes	No	No	No
St. Olav	Yes	No	No	No

As nouns, Olav II and St. Olav are synonyms defined as:

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

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