Genealogy is the study of the history of families, especially through studying historical documents to discover the relationships between particular people and their families.
N-COUNT
家谱；宗谱
A genealogy is the history of a family over several generations, for example describing who each person married and who their children were.
例句
He had sat and repeated his family's genealogy to her, twenty minutes of nonstop names.他坐下又给她细数了一遍他家族的家谱，20分钟内说出了一连串的名字。