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

Your

Brother's

Aunt's

Nephew's

Brother in law

is your BROTHER IN LAW !!

What relation is your brother's cousin's mother's nephew to you ?

What relation is your aunt's niece's father in law's daughter's brother to you ?

What relation is your cousin's father in law's daughter's aunt's sister's father to you ?

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

What relation is your father's daughter's brother's uncle to you ?

What relation is your sister's uncle's daughter's aunt's brother to you ?