A presentation of the fundamental constitution that preceded dynastic feudalism, with source materials pertaining to ninth-century France, and a consideration of the methods best suited for achieving significant insight, in particular in the reconstruction of aristocratic genealogical relationships. This study finds that the essential office of count invariably was inherited, ideally according to proximity and primogeniture, with the king and the aristocracy acting as a corporation to admit specific and well-understood variations to basic hereditary principles in a sophisticated juristic environment.