It’s random
Enligt Urban Dictionary så är Emzie dethär:
a completely and totally random nickname to give to the people you either care most or least about. Derives from the name Emma or Emily
Jill: Hi Emzie!
Emma: Hey Jill (backs away slowly)
Emma: Hey Jill (backs away slowly)
Emma: Why am i suddenly called Emzie, all the time? Is something wrong with my name?
