1The history of a family; a narrative about this. In later use also: the study of the history of a family or families; genealogy as an area of research.
The part of a medical history concerned with diseases, traits, and causes of death occurring within a patient's family.
family history/ˌfam(ɪ)li ˈhɪst(ə)ri/ /ˌfam(ə)li ˈhɪst(ə)ri/
Early 18th century. From family + history.