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

Your

Aunt's

Niece's

Brother's

Father in law

is your UNCLE !!

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

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

What relation is your grandmother's grandson's aunt's nephew to you ?

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

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

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