A niece. How could you not know that
Are you asking what you call your brothers daughter? Well if you are your brothers daughter is called your niece.
Your brothers ( or sisters ) daughter is your ( niece )
No, he lives with his brother and his brothers partner and daughter.
I don't know what they are called in English, but in Hindi, your daughter in law's parents would be called "Samdhees".
A niece. How could you not know that
Because they are both female, and that is the way the English language does it.
Your brother's wife is your sister-in-law.
Putravadhu (son's wife) is called Daughter-in-Law in English
Your mother's brother is your uncle. Your uncle's daughter is your first cousin. Any child of your first cousin is your first cousin, once removed.
Your brother's daughter would be your niece.
Your brother's daughter is your niece..and you are her AUNT.
3rd cousin I think:-)