criminal vs Rob Roy MacGregor

criminal and Rob Roy MacGregor both are nouns.

Word	Noun	Adjective	Verb	Adverb
criminal	Yes	Yes	No	No
Rob Roy MacGregor	Yes	No	No	No

criminal (noun)	Rob Roy MacGregor (noun)
someone who has committed a crime or has been legally convicted of a crime	Scottish clan leader and outlaw who was the subject of a 1817 novel by Sir Walter Scott (1671-1734)

criminal (adjective)	Rob Roy MacGregor (adjective)
guilty of crime or serious offense
involving or being or having the nature of a crime
bringing or deserving severe rebuke or censure