To your father 'Brother', to your father's father 'Son', to you 'Uncle'.
Your father's big brother is your uncle.
That is your uncle because it is your father's brother.
Your father's brother's son (or daughter) is your first cousin, and is usually called by name.
father's younger brother is called chacha
what i call my father elder brother's wife
Uncle
He's your uncle.
what i call my father elder brother's wife
Your father's brother is your uncle. English does not have different names for a father's elder and younger brother. If you are a boy, you are your uncle's nephew; if you are a girl, you are his niece.
aatha
Your Cousin
brother-in-law:- because before marriage she called me uncle hence her father was my brother by law, now she calls me dad so her father is a brother by law.