She is your sister-in-law.
sisters in law
Brother-in-law.
your brother-in-law :)
Your sister-in-law.
Phillipp uncle
There is no specific word for the husband of your wife's sister. If you need a phrase, call him your "sister-in-law's husband."
Jijaji- brother in law
dad's sister = maami, auntie (മാമി, ആന്റി) sister's husband = aliyan (അളിയ൯)
I think it is appropriate to call him your brother.
Your husband's sister's kids are referred to as your nieces and nephews by marriage. More specifically, you can call them your "nieces" if they are girls and "nephews" if they are boys.
The children of your husband's siblings are your nieces or nephews. Their children are your great-nieces or great-nephews.
I cannot see why not. There is no blood relationship between you and your sisters ex-husband.