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What relation is your aunt's niece's mother's husband to you ?

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

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

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

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

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