How about your brother.
Your husband's sister is your sister-in-law.
Your husband's sister in law is your sister.
In the English language, your sister's husband is called your brother-in-law.
Your sister's husband is called your brother- in-law.
Your husband's brother's wife or your husband's sister's husband have no relation to you. Your brother's or sister's wife or husband is called a sister or brother in-law. You are only related by the marriage between them and your sibling.
Your sister's husband is your brother-in-law.
Your sister's husband is your brother-in-law. It does not matter whether you speak of your elder sister or another sister, the same term is used for the husband of any one of your sisters.
Your Nephew
bava
In the cultures based on the European languages, your wife's sister is your sister-in-law. Her husband is not related to you. In India, a wife's sister's husband may be called "Co-Brother."
Your husband's sister is "la soeur de mon mari" in French, or "la belle-soeur" which is the term for the sister-in-law.
brother in law