family line vs origin

family line and origin both are nouns.

Word	Noun	Adjective	Verb	Adverb
family line	Yes	No	No	No
origin	Yes	No	No	No

As nouns, origin is a hypernym of family line; that is, origin is a word with a broader meaning than family line:

family line (noun)	origin (noun)
people descended from a common ancestor	properties attributable to your ancestry
	the point of intersection of coordinate axes; where the values of the coordinates are all zero
	an event that is a beginning; a first part or stage of subsequent events
	the hereditary derivation of an individual
	the place where something begins, where it springs into being
	the source of something's existence or from which it derives or is derived