In inheritance, a hereditary successor is a person who inherits an indivisible title or office after the death of the previous title holder. The hereditary line of succession may be limited to heirs of the body, or may pass also to collateral lines, in case of extinction of heirs of the body, depending on the succession rules. These concepts are in use in English inheritance law..
Main concepts for hereditary succession are usually either heir male or heir general β see further primogeniture (agnatic, cognatic, and also equal). "Heir male" is a genealogical term which specifically means "senior male by masculine primogeniture in the legitimate descent of an individual"