Your father's father is your
grandfather
Your father's wife is your
mother
Your mother's husband is your
father
Your mother's sister is your
aunt
Your mother's brother is your
Uncle
Your father's daughter is your
sister
Your father's son is your
brother
Your uncle's daughter is your
cousin
Your sister is your mother's
daughter
Your brother is your father's
son
Your sister is your grandfather's
granddaughter
