Your sister's aunt's brother+in+law's son's brother's grandfather is your which relation ?

Your

Sister's

Aunt's

Brother in law's

Son's

Brother's

Grandfather

is your GRANDUNCLE !!

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

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

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

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

What relation is your grandmother's grandson's aunt's daughter to you ?

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