If she is your sisters daughter then she is your neice :)
she would be your grandmals sisters sons daughter =)
She is your niece.
Your brothers ( or sisters ) daughter is your ( niece )
It is not her daughter is one of her sisters:)
Your aunt is the sister of either your mother or your father. Your aunt's sister is either:your mother, and her daughter is you (if you are a girl) or one of your sisters, oranother one of your mother's sisters, and her daughter is your first cousin, or,one of your father's sisters and her daughter is your first cousin.
yes it is
niece
Neice
Niece.
She is your niece.
Your sister's daughter would be considered your niece.