Your daughter is your brother's niece. Your brother is your daughter's uncle
Cousins
Your sister's daughter and your sister's brother are niece and uncle to each other. The daughter is the niece of the brother and the brother is uncle to the daughter.
Aunt and nephew
Your brother's daughter is your niece and his granddaughter is your great niece.
Your brother's daughter has a daughter? That is a great niece.
She would be your niece. and you would be her uncle.
Your brother's daughter is your niece. You are her Aunt or Uncle.
it will be your niece......
Your son's wife is your daughter-in-law. Her brother is your son's brother-in-law, but the English language has no word for a relationship between you and him. You are not considered to be related to him.
Your brother's daughter is your niece..and you are her AUNT.
Your brother's daughter and your daughter are first cousins to each other. Your brother's daughter and your daughter's daughter (your granddaughter) are first cousins, once removed, to each other.
Your son's wife is your daughter-in-law. Her brother is your son's brother-in-law, but the English language has no word for a relationship between you and him. You are not considered to be related to him.