Your brother's cousin's aunt's sister's brother+in+law is your which relation ?

Your

Brother's

Cousin's

Aunt's

Sister's

Brother in law

is your BROTHER IN LAW !!

What relation is your mother's sister's niece's uncle to you ?

What relation is your father's sister's brother in law's son's daughter to you ?

What relation is your aunt's nephew's mother's son to you ?

What relation is your aunt's cousin's son's brother's mother's uncle to you ?

What relation is your mother's cousin's son's wife to you ?

What relation is your mother's daughter's cousin's aunt's son to you ?