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What relation is your brother's aunt's nephew's father to you ?

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

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

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

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

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