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

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

What relation is your daughter's grandfather's sister's niece to you ?

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

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

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