parentage vs ancestry

parentage and ancestry both are nouns.

Word	Noun	Adjective	Verb	Adverb
parentage	Yes	No	No	No
ancestry	Yes	No	No	No

As nouns, parentage and ancestry are synonyms defined as:

Other synonyms of parentage include blood, blood line, bloodline, descent, line, line of descent, lineage, origin, pedigree, stemma, stock.

parentage (noun)	ancestry (noun)
the hereditary derivation of an individual	inherited properties shared with others of your bloodline
the kinship relation of an offspring to the parents	the hereditary derivation of an individual
the state of being a parent