Yes, and your brothers are his brother(s)-in-law
His sister's husband would also be considered your brother-in-law (however it would be threw marriage).
No, he is your husband's brother-in-law You aren't related. You do not share a common ancestor.
He is brother your brother in law.
Brother-In-Law means a wife or husbands brother and its your husband or wife's brother
These people are not related either by blood or by law. There is no name for their relation.
brother in law
You would call your husband's younger brother a brother-in-law.
Your brother would call your husbands sister by her first name. Or, "my (sibling's) sister in law.
Your sister's husband is your brother-in-law.
You call your husband's senior brother simply a brother in-law. There is no difference whether he is a senior brother or a younger brother he remains your brother in-law.
Sister-in-Law
There is no common ancestor, so you aren't really related. Related by marriage is one way to describe the relationship.
They are sisters in law.
Your uncles are the brothers of you mother or father, or the husbands of your parent's sisters.Your dad's sister-in-law could be the sister of his wife, your mother. In that case, her brother is also your mother's brother and is therefore your uncle.However, your dad's sister-in-law could be the wife of his brother. In that case, her brother is your dad's brother-in-law but is not related to you.