logical puzzle

Alok Kumar ( CA FINAL) (109 Points)

09 February 2011  

HI,after some serious results session,its time to let our mind work.so here I am with a small question. answer it & I will tell  correct answer soon.

Marys father has five daughters,1.NANA 2.NENE 3.NINI 4.NONO.

what is the name of fifth daughter?????

reply it and also tell time within which you get the answer.