Your mother's brother is your uncle. Your father is his brother-in-law but he could also have other brothers-in-law.
These would be men married to his other sisters, or the brothers of his wife.
If they are men who married his other sisters, they are your uncles. If they are brothers of his wife, they are not related to you.
Your mother's brother is your uncle. Any child of your mother's brother is your first cousin.
No.
If your brother-in-law is the brother of your wife then his mother is your mother-in-law. If your brother-in-law is the husband of your sister, his mother is not related to you but is your sister's mother-in-law.
If your mother and her brother share the same parents, then her brother's father would be considered your grandfather
Your mother's son is your brother or your half brother.
I have most commonly heard a brother-in-law's mother being referred to as a "mother-in-law"
Your sister's mother is also your mother.Your mother's brother is your uncle; and his brother is also your mother's brother, so he is also your uncle.Your uncle's son is your first cousin.
Your mother's half-brother is your uncle, or half-uncle if you want to be exceedingly precise.
There is no genealogical relationship. He is just your son-in-law's brother.
great uncle inlaw
You wife's uncle or "uncle by marriage".
Stepson; Son in law; Brother?