Your great uncle! (no blood relation there, but still your uncle:)
Your grandfathers' sisters' grandchildren are your second cousins.
sisters in law
She is your sister-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."
cousin
Jijaji- brother in law
Yes, along with your grandfathers' sisters, if any.
Your grandfather's cousin is your cousin twice removed. Her husband has no direct relationship to you.