A rumor was once circulated, in which it was said that there was a written message of Chen Lung of the Chinese Dynasty Qing saying 'my ancestor's family name is MINAMOTO and the first name is Yoshitsune, therefore, I named my dynasty as Qing (清), because he was a descendent of Emperor Seiwa (清和).'
清の乾隆帝の御文の中に「朕の先祖の姓は源、名は義経といい、その祖は清和天皇から出たので国号を清としたのだ」と書いてあった、という噂が流布した。