adulthood - the state (and responsibilities) of a person who has attained maturity

family relationship, kinship, relationship - state of relatedness or connection by blood or marriage or adoption

kinfolk, kinsfolk, phratry, family line, sept, folk, family - people descended from a common ancestor; "his family has lived in Massachusetts since the Mayflower"

breed - a special lineage; "a breed of Americans"

side - a family line of descent; "he gets his brains from his father's side"

family tree, genealogy - successive generations of kin