If your sister-in-law is the sister of your spouse, her brother is the brother of your spouse and your brother-in-law. If you are a woman, and your sister-in-law is the sister of your husband, then her brother could also be your husband.
If your sister-in-law is the wife of your brother, then her brother is not related to you.
no relation
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.
Brother-in-law
Your wife's brother is your brother-in-law, but in the English-speaking world the his wife is not related to you. It is common, however, for your children to consider her to be their aunt.
Your brother to her would be a brother-in-law.
Your wife's brother's son would be your nephew...
You would be 2nd cousins, assuming that the brother's wife's granddaughter is also the brother's granddaughter. If the granddaughter is not the granddaughter of the brother, there is no relationship.
You are your brother's wife's brother-in-law, if you are male. But your brother's wife can also have brothers-in-law who are not related to you or to your brother. They would be the husband's of the wife's sisters.
Your brother's son is your nephew. His wife is your brother's daughter-in-law but is not related to you.
Sister-in-law. same as your brother's wife.
Nothing, your husband's brother is your brother in law but his wife isnt related
Your wife's sister's husband is your wife's brother-in-law, but is not related to you.
Your wife's brother is your brother-in-law.