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

Your

Aunt's

Niece's

Uncle's

Daughter's

Father in law

is your UNCLE !!

What relation is your uncle's cousin's son's daughter in law to you ?

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

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

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

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

What relation is your sister's father's wife's son to you ?