The daughter of a niece is typically a grandniece. If you are referring to the granddaughter of a niece, she would also be considered a grandniece. Therefore, the daughter of a niece and the granddaughter of a niece are essentially the same person, both referred to as a grandniece.
If she is your sisters daughter then she is your neice :)
Your niece's daughter is your great niece and her granddaughter is your great great niece. You are the granddaughter's her great great aunt or great great uncle.
Your daughter and your niece are first cousins. Your daughter and your niece's daughter are first cousins, once removed.
Your sister's daughter is your niece and her granddaughter is your great niece.
Your sister's daughter is your niece. Your sister's granddaughter is your great niece Your sister's granddaughter's daughter (your sister's great granddaughter) is your great great niece. You are her great great aunt, if you are a woman, or her great great uncle, if you are a man.
Your brother's daughter is your niece and his granddaughter is your great niece.
great great neice
Your 1st cousin's granddaughter would be your daughter's niece.
You are the great-great-aunt/uncle to your niece's granddaughter. This means that your niece's granddaughter is your great-great-niece. The term "great-great" signifies that there are two generations between you and your niece's granddaughter.
That is the correct spelling of niece (a sibling's daughter).
This would be refered a neice yes it does not matter the relatinship like step neice if he is related in a marriage the that's his niece.
Please write a longer question. If you are asking what is her relationshipp to you - she's your neice. You are her uncle.