These persons are the parents of my brothers.
father and mother
This person is married to your mother.
father - stepfather
This person is the son of my uncle.
cousin
This person is married to your father.
mother - stepmother
This person is the sister of my mother.
aunt
This person is the father of my mother.
grandfather
This person is the brother of my father.
uncle
This person is the mother of your father.
grandmother