You have no close family relationship with him, in the western European tradition at least. So you call him your brother-in-law's brother.
Other cultures may vary.
Your wife's sister's husband is your wife's brother-in-law, but is not considered to be related to you.
She would be your sister.
brother in-law
He's your uncle.
You would call your husband's younger brother a brother-in-law.
Your parent would be a first cousin. She would be your husbands first cousin once removed.
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.
Yes, your sister's husband is your brother-in-law, as is your wife's brother.
Since your sister married a woman then her mate would be your husbands sister-in-law. However, if the woman your sister met dresses and acts like a man and your sister's mate requests it then she would be your husband's brother-in-law.
You might want to call her sister-in-law, even though to the best of my knowledge there is no officially designated relationship for this situation. But I am certain that she will be very happy to be accepted with the above designation.
I would say 'Schwaegerin', because her husband is the brother of your husband or her husband is the brother of your wife.
Your husband's brother is your brother-in-law but his wife is not related to you.
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).
It would be your son. You gave birth to your daughter right? And then along the way came a boy. So your husband's daughter's brother would be your son. If your husband was previously married and your husband's daughter's brother is not your genetic son, then he would be your stepson.
Your sister's husband is your brother-in-law. The English language has no term for the brother of your brother-in-law. You would not be considered to be related to him.