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

Your

Aunt's

Nephew's

Brother's

Brother in law

is your BROTHER IN LAW !!

What relation is your cousin's mother's brother in law's daughter's grandmother to you ?

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

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

What relation is your mother's husband's brother's son's daughter in law to you ?

What relation is your sister's mother's husband's daughter's brother in law to you ?

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