Your father's brother is your uncle.
what i call my father elder brother's wife
uncle
uncle
Your wife's brother is your brother-in-law.
cousin
Your Brother in law's wife
She would be your AUNT.
Your wife's brother would be called "brother-in-law".
aunt
younger brother's wife -- maradalu elder brother's wife ---vadina
The brother of your wife's cousin is also her cousin. You can call either of them "my wife's cousin." You are not related to them.