He had a prince, MINAMOTO no Hikoyoshi, but another theory suggests that Prince Yotsutsujinomiya Songa and his son, MINAMOTO no Yoshinari, were actually the princes of Imperial Prince Tadafusa.
王子には源彦善がいるが、四辻宮尊雅王及びその子源善成が実は忠房親王の王子であるとの説も存在する。