Superman dynasty in the context of "Emblem"

The Superman dynasty, an extension of the House of El, is a lineage of DC Comics superheroes. The term is used for the descendants of Kal-El, the original Superman, who continue to uphold his legacy of heroism for millennia, as depicted in the DC One Million crossover. Repeated references to members of the Superman dynasty, as Superman's "descendants" and at least one reference to them as the "blood of his blood" would seem to indicate that they are, in fact, the biological descendants of Superman in some fashion.