Husband in-law
2nd Answer:
Actually, it's 'Brother-in-law'.
sisters in law
She is your sister-in-law.
I cannot see why not. There is no blood relationship between you and your sisters ex-husband.
sister in law
Your sister-in-law.
your brother-in-law :)
Brother-in-law.
brother-in-law
he has a brother in the guards,married a girl called fiona kavanagh who did work for g4s with my husband
Mum's sisters husband is Masar Ji in Punjabi
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.
He's called your uncle becasue your mother's sisters are your aunts and the people married to them are your uncles (assuming that they're men).