Is my sisters husbands brother my brother in law?
Jessica Cortez
Updated on April 13, 2026
Besides, is my brother in law's brother related to me?
Nothing. That sibling is legally and genealogically a stranger to you. Your spouse's siblings (full, half or step) and your siblings' spouses are all your brothers-in-law and sisters-in-law. So the brother of your brother-in-law (i.e. sister's husband) is simply your brother-in-law's brother.
Beside above, what is your husband's brother in law to you? To clarify: if the husband's brother-in-law is your own brother, then you call him whatever you've always called him (and refer to him as your brother). If he's your husband's sibling's husband, then you don't refer to him as your brother. There's no preciser word than 'husband's brother-in-law' for that in English.
Likewise, what is my brother in law's sister called?
Sylvia's sister is not technically related to you at all. You should call her Claudine, because that is her name. You can also correctly refer to her as “My brother-in-law Bill's SIL Claudine.”
Can 2 sisters marry 2 brothers?
Double Cousins A double cousinship occurs only when a set of siblings marries another set of siblings and both have children. This could be two sisters marrying two brothers. In your case, this is a brother and sister marrying a sister and brother. Double cousins actually share the same gene pool as siblings.