Your father's/mother's sister is your Aunt.
Your father's/mother's brother is your Uncle.
Your grand father's/grand mother's sister is your Great Aunt.
Your grand father's/grand mother's brother is your Great Uncle.
The children on your Great Aunt/Unsle would be cousins to your parents, and Great Cousins to you .
Similarly,
Great Grand Father/Mother , they would be Great Great Aunt/Uncle .
Your father-in-law's sister is your spouse's aunt but is not related to her. Call her by her name.
Your sister's husband is your father's son-in-law.
The sons of your father's sister are your first cousins.
Your father's sister is your, paternal aunt,and your mother's sister is your, maternal aunt.Father's sister is your aunt.
Your father's sister's son (or daughter) is your first cousin.
um your dads sister is obviously your aunt!
She is your aunt.
You don't call your brother's sister your aunt. Your brother's sister is your sister, or you. Your aunt is the sister of your mother or father.
An Aunt.
AUNT
Cousin
Grammatically it is ' Father's in law ' . His sister would be your ' Aunt in law' However, it is generally accepted as 'Aunt'.