Your mother's sister is your aunt. Her husband is your uncle.
sisters in law
She is your sister-in-law.
Your sister-in-law.
your brother-in-law :)
Brother-in-law.
Our cousins are our mothers sisters son :)
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."
your great aunt.
Jijaji- brother in law
Your mothers sisters Granddaughter is your second cousin
Your mothers husband would be your step father and you would be a step son or step daughter.