uncle -in- law
Nieces.
I call them my uncles
Your wife's brother is your brother-in-law.
My wifes brother in law!
Your grandmother's brother's wife is your great aunt.
would it be a brother in law? not sure about this one! Is it your husband/wifes daughters brother?
would it be a brother in law? not sure about this one! Is it your husband/wifes daughters brother?
While generally referred to as a Sister-in-law, there is no relationship.
Your grandfather's brother's grandson is your great uncle's grandson. The grandchildren of great aunts and great uncles are your second cousins.
There is no specific relation. They're just a distant relative. But if you are very close to them, you would often call them your cousin, even though that isn't the case.
Your father's brother's son is your first cousin. The English language does not have a name for the wife of a cousin. You would simply refer to her as "my cousin's wife."
Your sister in law is your husband's sister or your brother's wife.