How about your brother.
You would call your sister's husband your brother-in-law.
The sister of your husband is your sister-in-law.
sister
The English language has no term for a relationship between you and your husband's sister's husband. Most people would not consider her to be related to you. You could call her your sister-in-law's husband.
The English language has not special term for the husband of your sister-in-law. You woudl call him your "sister-in-law's husband."
The English language has no term for a relationship between you and your husband's sister's husband. Most people would not consider her to be related to you. You could call her your sister-in-law's husband.
The English language has no term for a relationship between you and your husband's sister's husband. Most people would not consider her to be related to you. You could call her your sister-in-law's husband.
Your sister's husband is your brother-in-law, but in conversation you would not use that term as a title, but would call him by name.
Your sister in law is your husband's sister or your brother's wife.
Your mother's husband's sister is your mother's sister-in-law. Her sister-in-law's husband is not related to your mother, but is her husband's brother-in-law.The most common ways of referring to him would be "my sister-in-law's husband" or "my husband's brother-in-law."
brother-in-law
Your mother's sister's daughter is your first cousin. Your first cousin is not related to you. You would call him by name, or refer to him as "my cousin's husband."