Your sister-in-law is either the wife of your brother or the sister of your spouse.
If you have more than one brother, and your sister-in-law is the wife of one brother, then she is the sister-in-law of the other.
If your sister-in-law is the sister of your spouse, she has no direct relationship to your brother. He can call her "my brother's sister-in-law", or "my nephew's aunt."
your mom's brother would be your uncle
He is his brother-in-law.
your dad's brother would be your uncle
Your daughter is your brother's niece. Your brother is your daughter's uncle
The relationship between the families of inlaws is similar to the relation ship with their family members. For example The relationship of my brother in law(sister's husband) and my another brother in law (wife's brother) will be simmilar to those relation ships with their brother's family.
Cousins
They are Brother & Sister.
Your brother's wife is your sister-in-law. The English language has no relationship term for the brother of your sister-in-law. He is not considered to be related toyou, although he is your brother's brother-in-law.
a cow
Nothing, your husband's brother is your brother in law but his wife isnt related
Brother-in-law
He is your nephew And you are his Aunt