No, your father's brother's son is your cousin. Unless, you have the same mother in which case you would be both cousins and siblings.
you are his nephew or neice
Your father's brother is your Uncle.
Your father-in-law's elder brother is your uncle-in-law.
Your father's father's brother is your great uncle.
Your brother or brother in law
what i call my father elder brother's wife
what i call my father elder brother's wife
what i call my father elder brother's wife
No specific word for Just Brother. Elder brother means Anna. Most elder brother is periya(big) brother. Younger brother means Thambi. Most younger brother is chinna(small) thambi.
The brothers of your husband are your brothers-in-law.
your
In Hindi, your father's elder brother is called "chacha" (เคเคพเคเคพ).
Your brother's wife is your sister-in-law.