Your aunt's cousin's son's father+in+law is your which relation ?

Your

Aunt's

Cousin's

Son's

Father in law

is your UNCLE !!

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

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

What relation is your cousin's aunt's sister's grandfather to you ?

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

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

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