In China, a winner of domestic war - not necessarily a son of an emperor - asked an former emperor to transfer his power to him, and acceded to the imperial throne and chaged the name of the country.
また中国では国内で戦争が起こりその勝者が皇帝に対し禅譲を要求して皇帝となり国号を変え前皇帝の男子の子孫でない別の者が皇帝となっている。