You are the great aunt/uncle
Your wife's niece is also your niece, and her daughter is your great niece. It is to be hoped that you do not have a relationship WITH her, merely TO her.
Since your niece is your daughter's first cousin, your grand niece (the daughter of your niece) is your daughter's first cousin, once removed.
great niece
Your daughter and your niece are first cousins to each other.
Your sister's daughter is your niece. Your niece's husband is not related to you.
Your niece's daughter is your great niece. You are her great aunt or great uncle, depending on your sex.
Your sister's daughter is your niece.
You are her great-aunt/uncle. She is your great-niece.
Your Niece.
it will be your niece......
Your sister's daughter is your niece and you are her aunt (if you are a woman) or her uncle (if you are a man).
Your daughter and your niece are first cousins Your daughter and your great grand niece are first cousins, twice removed.