family vs Marx Brothers

family and Marx Brothers both are nouns.

Word	Noun	Adjective	Verb	Adverb
family	Yes	No	No	No
Marx Brothers	Yes	No	No	No

family (noun)	Marx Brothers (noun)
primary social group; parents and children	a family of United States comedians consisting of four brothers with an anarchic sense of humor
people descended from a common ancestor
a social unit living together
(biology) a taxonomic group containing one or more genera
a collection of things sharing a common attribute
an association of people who share common beliefs or activities
a loose affiliation of gangsters in charge of organized criminal activities
a person having kinship with another or others