"In genealogy, the progenitor (rarer: primogenitor; German: Stammvater or Ahnherr) is the – sometimes legendary – founder of a family, line of descent, clan or tribe, ...
[Read more]
noble house or an ethnic group. Genealogy (commonly known as family history) understands a progenitor to be the earliest recorded ancestor of a consanguineous family group of descendants.
Progenitors are sometimes used to describe the status of a genealogical research project, or in order to compare the availability of genealogical data in different times and places. Often, progenitors are implied to be patrilineal. If a patrilineal dynasty is considered, each such dynasty has exactly one progenitor." - (en.wikipedia.org 03.01.2021)