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If your brother-in-law is the husband of your sister, presumably his daughter is your sister's daughter, too. Then his daughter and your nephew are either brother and sister or first cousins. If the daughter is not your sister's daughter, but the child of a previous marriage, then she is could be the half-sister of your nephew or not related to your nephew at all.
If your brother-in-law is the brother of your spouse, then his daughter is your niece and your niece and your nephew are either siblings, first cousins, or not related at all, depending on how your nephew is related to you.
What else can I help you with?
What is the relationship between your nephew and your daughter?
Your nephew and your daughter are first cousins.
What relationship is your daughter to your nephew?
They would be cousins.
What is your relationship to your nephew's daughter?
Your nephew's daughter is your great niece and you are her great aunt (if you are a woman) or her great uncle (if you are a man).
What is your daughter's son's relationship to your other daughter?
Your daughter's son is your other daughter's nephew and she is his aunt.
I am my fathers daughter. What is my relationship to his nephew?
You are his first cousin.
What is the relationship between your grandson and your brother's daughter?
Aunt and nephew
What is the name of my relationship to my daughter's nephew?
Great aunt or uncle.
What would your sons daughter's relationship be to your nephew's daughter?
Your son and your nephew are first cousins to each other. Their daughters are second cousins to each other.
My son's wife is what relationship to you?
Daughter in law
What is the relationship of your brother's daughter's son to you?
the boy is a grand nephew 2 me
What is relationship of my nephew's daughter?
Well the daughter will be your grandaughter and you will be a grandmother/grandfathther.
What is the name of my relationship to my nephew's daughter?
Your nephew's daughter is your great niece. You are her great aunt (if you are a woman) or her great uncle (if you are a man).
