the.com/genealogy

means The study and tracing of a family's ancestry and lines of descent across generations.

from From Greek genea, 'generation' or 'race,' plus -logia, 'study of.' The genea root is a cousin of words tied to birth and origin, like genesis and genus — all circling the same ancient idea of coming-into-being. Latin picked up the Greek word as genealogia, and it passed into English by the medieval period already meaning exactly what it means now: a reckoning of who begat whom.