Your brother's grandmother's grandson's father+in+law is your which relation ?

Your

Brother's

Grandmother's

Grandson's

Father in law

is your UNCLE !!

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

What relation is your aunt's daughter's father in law's son's grandmother to you ?

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

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

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

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