Genealogy (from Greek: γενεά, genea, "generation"; and λόγος, logos, "knowledge") is the study of families and the tracing of their lineages and history. Genealogists use oral traditions, historical records, genetic analysis, and other records to obtain information about a family and to demonstrate kinship and pedigrees of its members. The results are often displayed in charts or written as narratives.

The pursuit of family history tends to be shaped by several motivations, including the desire to carve out a place for one's family in the larger historical picture, a sense of responsibility to preserve the past for future generations, and a sense of self-satisfaction in accurate storytelling.

Hobbyist genealogists typically pursue their own ancestry and that of their spouses. Professional genealogists may also conduct research for others, publish books on genealogical methods, teach, or produce their own databases. They may work for companies that provide software or produce materials of use to hobbyist and other professional genealogists. Both try to understand not just where and when people lived, but also their lifestyles, biographies, and motivations. This often requires—or leads to—knowledge of antiquated laws, old political boundaries, migration trends, and historical socioeconomic or religious conditions.