Your brother's father-in-law is not related to you unless you and your brother married sisters from the same family. Then he would be your father-in-law, too.
He is brother your brother in law.
There is none, as there is no actual relationship.
Your brother-in-law is either the husband of your sister or the brother of your spouse.Where your brother-in-law is the husband of your sister, there is no relationship name in the English language to describe his brother's relationship to you. However, in that situation your brother-in-law's brother is your sister'sbrother-in-law.Where your brother-in-law is the brother of your spouse, his brother is also your brother-in-law.
If you have no siblings but your daughter has an uncle, he is the brother of your spouse, your brother-in-law.
Your wife's brother is your brother-in-law.
Brother-in-law
Unless your brother-in-law's brother is your husband, there is no direct relationship.
There is no word in the English language for a relationship between grandmothers of related grandchildren
Your brother's wife is your sister-in-law. The English language has no relationship term for the brother of your sister-in-law. He is not considered to be related toyou, although he is your brother's brother-in-law.
Your sister-in-law's husband is never your brother-in-law. He can be your brother, when your sister-in-law has that relationship to you because she is married to your brother. You could also have a sister-in-law who is the sister of your spouse. But then her husband is not related to you.
Your brother to her would be a brother-in-law.
Your brother-in-law's children are your nephews and nieces.