He would be your brother-in-law
A hoe.
aunt
Your brother's wife is your sister-in-law.
We call "Mami" to moms brother's wife.
In the English language there is no difference between the wife of an elder brother and the wife of a younger brother or of a twin brother. The wife of any brother is your sister-in-law. If you are actually talking to her, however you should just call her by her name. Nicknames are fine too.
She is your aunt. This is true in most traditions. English does not distinguish between an aunt by marriage (father's brother's wife) or an aunt by blood relation (father's sister).
probably by her name
sister in law
Brother-in-law
Pick up the phone
Sister In law
errrr, no maybe nephew