By the way when Emperors are demoted from nobility to subject, they keep their names although the title of the Emperor cancelled, however there are some cases where they changed their names from the original to another, for example, Prince Kazuraki (TACHIBANA no Moroe) to Moroe, Prince Mochihito to Mochimitsu.
なお、臣籍降下に際して、王の身位は当然に除かれるとは言え、名は改めないのが通常であるが、葛城王（橘諸兄）から諸兄、以仁王から以光などのように改める事例もある。