Cyrus the Great vs Cyrus II

Cyrus the Great and Cyrus II both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cyrus the Great	Yes	No	No	No
Cyrus II	Yes	No	No	No

As nouns, Cyrus the Great and Cyrus II are synonyms defined as:

Cyrus the Great and Cyrus II: king of Persia and founder of the Persian Empire (circa 600-529 BC)

Other synonyms of Cyrus the Great include Cyrus the Elder.

Cyrus the Great (noun)	Cyrus II (noun)
king of Persia and founder of the Persian Empire (circa 600-529 BC)	king of Persia and founder of the Persian Empire (circa 600-529 BC)