Ancestry, Pedigree, and LINEAGE are all terms used to describe the same concept. They refer to a person's family history or genealogy, which is the study of a person's ancestors and their descendants. Ancestry and Pedigree are often used interchangeably, while LINEAGE is more commonly used to refer to a person's direct line of descent from a particular ancestor. All three terms are used to trace a person's family tree and to understand their heritage.