Kanmu-Heishi (Taira clan), whose origin is TAIRA no Masakado, demoted from nobility to subject and is an Imperial descendant (posterity) which makes Masakado related to Emperor Kammu as his great-great-grandson (one theory says related as a great-great-great-grandchild).
なお平将門の出身である桓武平氏は、臣籍降下した皇胤であり、将門は桓武天皇の続柄玄孫（一説には続柄来孫）にあたる。